NCERT CLASS 11 | TOPIC : NEURAL CONTROL AND CO-ORDINATION | QB-2 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 11 | TOPIC : NEURAL CONTROL AND CO-ORDINATION | QB-2 | NEET BIOLOGY ONLINE TEST

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It contains 95 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 101. When all three types of cones are stimulated equally, a sensation of _________ light is produced?

(a) Black (b) White (c) Blue (d) Green

2 ➤ 102. Select the incorrect matching:

(a) Optic nerve – Carry impulse to visual cortex (b) Cones – Colour vision (c) Cornea and lens – Focusing of light on retina (d) Pupil – Generate action potential

3 ➤ 103. Vitreous chamber is filled with

(a) Transparent sol called vitreous humour (b) Transparent gel called vitreous humour (c) Opaque sol called vitreous humour (d) Opaque gel called vitreous humour

4 ➤ 104. Select the incorrect statement from the following:

(a) Rhodopsin is also known as visual purple. (b) Rods contain a purplish-red protein, which in turn contains the derivative of Vitamin A. (c) In human eye three type of cones are present. (d) At fovea of retina, the resolution (visual acuity) is minimum.

5 ➤ 105. The location at which Optic nerve leaves the eye balls is

(a) Slightly below the posterior pole of eye ball (b) Slightly above the posterior pole of eye ball (c) Anterior pole of eye ball (d) Macula lutea

6 ➤ 106. Arrange the following steps of mechanism of vision in order.

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(1) Light induces dissociation of the retinal from opsin.

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(2) Change in the structure of opsin.

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(3) Change in membrane permeability.

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(4) Potential differences are generated in photoreceptor cells.

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(5) Generation of AP is ganglion cell through bipolar cells.

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(6) AP is transmitted via optic nerve to visual cortex.

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(7) At visual cortex, nerve impulses are analysed and the image formed on retina is recognized based on the earlier memory and experience.

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(8) Focusing of visible light on retina.

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(a) 8,1,2,3,4,5,6,7 (b) 8,1,7,2,6,3,5,4 (c) 1,2,3,4,5,6,7,8 (d) 8,7,6,5,4,3,2,1

7 ➤ 107. Ear performs which of the following sensory functions?

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(A) Vision

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(B) Olfaction

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(C) Hearing

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(D) Maintenance of body balance

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(a) A, B, C (b) B and C Only (c) C and D Only (d) C Only

8 ➤ 108. Identify A to F in the given figure.

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(a) A–Cochlear nerve, B–Incus, C–Eustachian tube, D–Cochlea, E–External auditory canal,F–Tympanic membrane (b) A–External auditory canal, B–Eustachian tube, C–Temporal bone, D–Steps in oval window, E–Tympanic membrane, F–Cochlear nerve (c) A–Cochlea, B–Tympanic membrane, C–Incus, D–Cochlear nerve, E–Eustachian tube, F–External auditory canal (d) A–Temporal bone, B–Steps in oval window, C–Cochlear nerve, D–Eustachian tube, E–Tympanic membrane, F–External auditory canal

9 ➤ 109. Anatomically the ear can be divided into how many major sections?

(a) 1 (b) 2 (c) 3 (d) 4

10 ➤ 110. Ear is divided into

(a) Outer ear (b) Middle ear (c) Inner ear (d) All of these

11 ➤ 111. Tympanic membrane consists of

(a) Skin on outside (b) Connective tissue in middle part (c) Mucus membrane on inside (d) All of these

12 ➤ 112. The _________ is attached to the tympanic membrane and the _________ is attached to the oval window of the cochlea.

(a) Malleus, Incus (b) Incus, Stapes (c) Malleus, Stapes (d) Stapes, Malleus

13 ➤ 113. Select the incorrect statement:

(a) Eustachian tube connects the middle ear cavity with the pharynx. (b) The eustachian tube helps in equalizing the pressure on either sides of ear drum. (c) Oval window is a part of cochlea. (d) The ear ossicle decreases the efficiency of transmission of sound waves to the inner ear.

14 ➤ 114. Select the correct matching:

(a) Inner ear ossicle → Malleus, incus and stapes (b) Scala media → Filled with perilymph (c) Fluid filled inner ear → Labyrinth (d) Bony labyrinth → Surrounded by tympanic membrane

15 ➤ 115. Inner ear contains all except

(a) Reissner’s membrane (b) Basilar membrane (c) Cochlea (d) Stapes

16 ➤ 116. Select the total number of true statement from the following:

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(1) Scala vestibuli ends at the oval window.

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(2) Scala tympani terminates at round window.

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(3) Vestibular apparatus is located above cochlea.

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(4) Otolith organ consists of saccule and utricle.

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(a) 1 (b) 2 (c) 3 (d) 4

17 ➤ 117. Vestibular apparatus consists of

(a) Three semicircular canal (b) Saccule (c) Utricle (d) All of these

18 ➤ 118. Specific receptors of the vestibular apparatus responsible for the maintenance of balance of the body and posture is

(a) Macula (b) Crista (c) Organ of corti (d) Both (a) and (b)

19 ➤ 119. Each semicircular canal lies in a different plane at _________ angle to each other.

(a) 45o (b) 60o (c) 90o (d) 120o

20 ➤ 120. In man the receptors stimulated by sound waves are

(a) Organ of corti (b) Semicircular canal (c) Utriculus (d) Sacculus

21 ➤ 121. Scala vestibuli is connected with

(a) Scala media (b) Fenestra ovalis (c) Scala tympani (d) Fenestra rotundus

22 ➤ 122. The cochlea of mammalian internal ear is concerned with

(a) Hearing (b) Balance of body posture (c) Both (a) and (b) (d) Perception changes of atmospheric pressure

23 ➤ 123. Identify the correct sequence of organs/regions in the organization of human ear as an auditory mechanoreceptor organ.

(a) Pinna–Cochlea–Tympanic membrane–Auditory canal–Malleus–Stapes–Incus–Auditory nerve (b) Pinna–Auditory canal–Tympanic membrane–Malleus–Incus–Stapes–Cochlea–Auditory nerve (c) Pinna–Tympanic membrane–Auditory canal–Incus–Malleus–Stapes–Cochlea–Auditory nerve (d) Pinna–Malleus–Incus–Stapes–Auditory canal–Tympanic membrane–Cochlea–Auditory nerve

24 ➤ 124. Internal ear is filled with

(a) Perilymph (b) Endolymph (c) Lymph (d) Both (a) and (b)

25 ➤ 125. Reissner’s membrane is found in

(a) Cochlea of mammal (b) Eye of mammal (c) Heart of mammal (d) Nasal duct of mammal

26 ➤ 126. In the internal ear, the organ of Corti which bears hair cells is located in

(a) Sacculus (b) Scala media (c) Scala tympani (d) Scala vestibuli

27 ➤ 127. Equilibrium of the body is maintained by

(a) Sacculus and cochlea (b) Semicircular canals and utriculus (c) Eustachian tube (d) Ear ossicles

28 ➤ 128. Which of the following senses is affected if the tectorial membrane is removed from human?

(a) Balance (b) Hearing (c) Vision (d) Smell

29 ➤ 129. Malleus (hammer shape), incus (anvil shape) and stapes (stirrup shape) are present in

(a) Internal ear of frog (b) Middle ear of human (c) Eye of rabbit (d) Eye of frog

30 ➤ 130. The waxy substance that coats the surface of auditory canal is produced by

(a) Harderian glands (b) Meibomian glands (c) Zeis glands (d) Ceruminous glands (sebaceous gland)

31 ➤ 131. Macula in man are present in

(a) Semicircular canals (b) Utriculus (c) Sacculus (d) Both utriculus and sacculus

32 ➤ 132. Which of the following parts in your body is concerned with the sense of balance?

(a) Eustachian tube (b) Cochlea (c) Eardrum (d) Semicircular canals

33 ➤ 133. The fluid present in the semicircular canals of the internal ear of human is

(a) Endolymph (b) Perilymph (c) Lymph (d) Coelomic fluid

34 ➤ 134. Identify A, B, C, D, E, F and G in the given figure.

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(a) A–Scala vestibuli, B–Tectorial membrane, C–Scala tympani, D–Basilar membrane, E–Organ of corti, F–Scala media, G–Reissner’s membrane (b) A–Scala tympani, B–Reissner’s membrane, C–Scala vestibuli, D–Basilar membrane, E–Scala media, F–Organ of corti, G–Tectorial membrane (c) A–Reissner’s membrane, B–Tectorial membrane, C–Scala media, D–Organ of corti, E–Scala vestibuli, F–Scala tympani, G–Basilar membrane (d) A–Tectorial membrane, B–Scala tympani, C–Reissner’s membrane, D–Basilar membrane,E–Scala vestibuli, F–Scala vestibuli, G–Organ of corti

35 ➤ 135. Which one of the following is not a part of ear?

(a) Eustachian tube (b) Cone cell (c) Utriculus (d) Sacculus

36 ➤ 136. The base of semicircular canals is swollen and is called _________ which contain a projecting ridges called _________ which ahs hair cells.

(a) Papilla, macula ampullaris (b) Ampulla, crista ampullaris (c) Ampulla, macula ampullaris (d) Macula, crista ampullaris

37 ➤ 137. Otolith organ consist of

(a) Saccule (b) Utricle (c) Semicircular canal (d) Both (a) and (c)

38 ➤ 138. Select the correct statement:

(a) Neural system co-ordinates and integrates functions as well as metabolic and homeostatic activities of all organs (b) Chemical involved in the transmission of impulse at chemical synapses are always proteins (c) The electrical potential difference across the resting neural membrane is called the action potential (d) Organ of Corti influenced by gravity and movement and helps in maintaining balance of the body and posture

39 ➤ 139. Assertion: The sensation of different colours are produced by various combinations of five types of cones found in our eyes. Reason: Cones are responsible for vision in dim light.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

40 ➤ 140. Assertion: Nerve impulse can never be transmitted from dendrite or cell body of one neuron to the axon of the next neuron, across a synapse. Reason: This happens because of the synaptic delay at each synapse.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

41 ➤ 141. Assertion: After hearing a sound, the nerve impulse passes from neurons to the brain.Reason: The neurons which pass nerve impulses from the body organ to the brain is called afferent neuron.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

42 ➤ 142. Assertion: Cerebrospinal fluid is present throughout the central nervous system.Reason: CSF has no function.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

43 ➤ 143. Assertion: The cerebellum has very convoluted surface.Reason: It provides additional space for many more neurons.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

44 ➤ 144. Assertion: Some areas of the brain and spinal cord look white.Reason: This is because cell bodies of neurons are situated in those areas.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

45 ➤ 145. Assertion: Motor neuron terminates on a motor end plate at the neuromuscular junction.Reason: Motor endplate acts as receptor for detecting changes in the muscle fibres.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

46 ➤ 146. Assertion: Crista and macula are the specific receptors of vestibular apparatus responsible for the maintenance of balance of the body and posture. Reason: Cochlea helps in hearing.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

47 ➤ 147. Assertion: Spinal cord has a column of both grey and white matter.Reason: Grey matter forms the central spinal canal.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

48 ➤ 148. Assertion: All motor neurons are efferent neurons.Reason: Motor neurons conduct nerve impulses from the spinal cord to the brain.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

49 ➤ 149. Assertion: The chemical stored in the synaptic vesicles are termed as neurotransmitters.Reason: Synaptic vesicles release these chemicals in the synaptic cleft.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

50 ➤ 150. Assertion: Medulla oblongata causes reflex actions like vomiting, coughing and sneezing.Reason: It has many nerve cells which controls autonomic reflexes.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

51 ➤ 151. Assertion: Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.Reason: Transmission across a synapse usually requires neurotransmitters because there is small space, i.e., synaptic cleft, that separates one neuron from another.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

52 ➤ 152. Assertion: The place in retina from which the optic nerve leaves is known as blind spot. Reason: Because this place is devoid of photoreceptor cells.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

53 ➤ 153. Assertion: Cornea transplants are successful. Reason: Cornea is avascular and so there is no reaction of immune system.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

54 ➤ 154. Assertion: Owl can see at night. Reason: They possess a large number of rods and few cones in their retina.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

55 ➤ 155. Assertion: Vitamin – A deficiency produce night blindness. Reason: Vitamin – A forms retinal, a component of visual pigments in rods and cones.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

56 ➤ 156. Assertion: Surface of cerebrum is highly folded. Reason: To increase the area for having more neurons.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

57 ➤ 157. Assertion: Person fails to hear by destroying temporal lobe.Reason: Temporal lobe having auditory area.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

58 ➤ 158. Assertion: Conditioned reflex requires previous experience.Reason: It is controlled by cerebrum initially.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

59 ➤ 159. Assertion: In a myelinated nerve fibre the impulse jumps from one node of Ranvier to the other.Reason: Exchange of ions takes place only at node of Ranvier.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

60 ➤ 160. Assertion: No image is formed at the exit of optic nerve.Reason: It lacks the receptor cells and is insensitive to light.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

61 ➤ 161. Assertion: Unmyelinated fibres are without myelin sheath.Reason: Schwann cells are absent in unmyelinated fibres.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

62 ➤ 162. Assertion: Ionic gradient is present across the resting membrane in nerve fibre.Reason: It is due to active transport of ion by sodium and potassium pump.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

63 ➤ 163. Assertion: Hypothalamus is called thermostat of body.Reason: Hypothalamus contain centre for thermoregulation.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

64 ➤ 164. Assertion: Cerebral cortex is referred as the white matter.Reason: It is due to its whitish appearance.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

65 ➤ 165. Assertion: We can equalise pressure on either side of ear drum.Reason: Eustachian tube connects inner ear with pharynx.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

66 ➤ 166. Assertion: Impulse transmission across an electrical synapse is always faster than that across a chemical synapse. Reason: At electrical synapses, the membranes of pre- and post-synaptic neurons are in very close proximity.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

67 ➤ 1. Select the answer with correct matching of the structure, its location and function. [A: Structure, B: Location, C: Function] [AIPMT MAINS 2010]

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A) B) C) D)

68 ➤ 2. The nerve centres which control the body temperature and the urge for eating are contained in [AIPMT PRE 2010]

(a) Hypothalamus (b) Pons (c) Cerebellum (d) Thalamus

69 ➤ 3. The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eyes is a derivative of [AIPMT PRE 2011]

(a) Vitamin C (b) Vitamin D (c) Vitamin A (d) Vitamin B

70 ➤ 4. When a neuron is in a resting state, i.e., not conducting any impulse, the axonal membrane is [AIPMT PRE 2011]

(a) Equally permeable to both Na+ and K+ ions. (b) Impermeable to both Na+ and K+ ions. (c) Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions. (d) Comparatively more permeable to Na+ ions and nearly impermeable to K+ ions.

71 ➤ 5. The human hind-brain comprises three parts, one of which is [AIPMT PRE 2012]

(a) Spinal cord (b) Corpus callosum (c) Cerebellum (d) Hypothalamus

72 ➤ 6. Which part of the human ear plays no role in hearing as such but is otherwise very much required? [AIPMT PRE 2012]

(a) Eustachian tube (b) Organ of Corti (c) Vestibular apparatus (d) Ear ossicles

73 ➤ 7. A person entering an empty room suddenly finds a snake right in front of the opening of door. Which one of the following is likely to happen in his neuro-hormonal control system? [AIPMT PRE 2012]

(a) Sympathetic nervous system is activated releasing epinephrine and norepinephrin efrom adrenal medulla. (b) Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse. (c) Hypothalamus activates the parasympathetic division of brain. (d) Sympathetic nervous system is activated releasing epinephrine and the system is activated releasing epinephrine and norepinephrine from adrenal cortex.

74 ➤ 8. A diagram showing axon terminal and synapse is given. Identify correctly at least two of A to D. [AIPMT 2013]

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(a) A – Receptor C – Synaptic vesicles (b) B – Synaptic connections D – K+ (c) A – Neurotransmitter B – Synaptic cleft (d) C – Neurotransmitter D – Ca++

75 ➤ 9. The parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives the correct identification along with its function/characteristics. [AIPMT 2013]

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(a) A – Retina – Contains photoreceptors rods and cones (b) B – Blind spot – Has only a few rods and cones (c) C – Aqueous chamber – Reflects the light which does not pass through the lens (d) D – Choroid – Its anterior part forms ciliary body

76 ➤ 10. Injury localized to the hypothalamus would most likely disrupt the [AIPMT 2014]

(a) Short-term memory (b) Coordination during locomotion (c) Executive functions, such as decision making (d) Regulation of body temperature

77 ➤ 11. Which one of the following statements is not correct? [AIPMT 2014]

(a) Retinal is the light absorbing portion of visual photo pigments. (b) In retina the rods have the photopigment rhodopsin while cones have three different photopigments. (c) Retinal is a derivative of Vitamin C. (d) Rhodopsin is the purplish red protein present in rods only.

78 ➤ 12. Which of the following regions of the brain is incorrectly paired with its function? [AIPMT 2015]

(a) Medulla oblongata – Homeostatic control (b) Cerebellum – Language comprehension (c) Corpus callosum – Communication between the left and right cerebral cortices (d) Cerebrum – Calculation and contemplation

79 ➤ 13. A gymnast is able to balance his body upside down even in the total darkness because of [AIPMT 2015]

(a) Cochlea (b) Vestibular apparatus (c) Tectorial membrane (d) Organ of corti

80 ➤ 14. In mammalian eye, the ‘fovea’ is the centre of the visual field, where [RE-AIPMT 2015]

(a) The optic nerve leaves the eye (b) Only rods are present (c) More rods than cones are found (d) High density of cones occur, but has no rods

81 ➤ 15. Destruction of the anterior horn cells of the spinal cord would result in loss of [RE-AIPMT 2015]

(a) Voluntary motor impulse (b) Commissural impulses (c) Integrating impulses (d) Sensory impulses

82 ➤ 16. Photosensitive compound in human eye is made up of: [NEET - I, 2016]

(a) Guanosine and Retinol (b) Opsin and Retinal (c) Opsin and Retinol (d) Transducin and Retinene

83 ➤ 17. Choose the correct statement. [NEET - II, 2016]

(a) Meissner’s corpuscles are thermoreceptors (b) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarized in response to the light stimulus (c) Receptors do not produce graded potentials (d) Nociceptors respond to changes in pressure

84 ➤ 1. Chemicals which are released at the synaptic junction are called

(a) Hormones (b) Neurotransmitters (c) Cerebrospinal fluid (d) Lymph

85 ➤ 2. The potential difference across resting membrane is negatively charged. This is due to differential distribution of the following ions.

(a) Na+ and K+ ions (b) CO3++ and Cl- ions (c) Ca+ + and Mg+ + ions (d) Ca+ + and Cl- ions

86 ➤ 3. Resting membrane potential is maintained by

(a) Hormones (b) Neurotransmitters (c) Ion pumps (d) None of these

87 ➤ 4. The function of our visceral organs is controlled by

(a) Sympathetic and somatic neural system (b) Sympathetic and parasympathetic neural system (c) Central and somatic nervous system (d) None of these

88 ➤ 5. Which of the following is not involved in knee-jerk reflex?

(a) Muscle spindle (b) Motor neuron (c) Brain (d) Inter-neurons

89 ➤ 6. An area in the brain which is associated with strong emotions is

(a) Cerebral cortex (b) Cerebellum (c) Limbic system (d) Medulla

90 ➤ 7. Mark the vitamin present in Rhodopsin

(a) Vitamin A (b) Vitamin B (c) Vitamin C (d) Vitamin D

91 ➤ 8. Human eyeball consists of three layers and it encloses

(a) Lens, iris, optic nerve (b) Lens, aqueous humour and vitreous humour (c) Cornea, lens, iris (d) Cornea, lens, optic nerve

92 ➤ 9. Wax gland present in the ear canal is called

(a) Sweat gland (b) Prostate gland (c) Cowper’s gland (d) Sebaceous gland/ceruminous gland

93 ➤ 10. The part of internal ear responsible for hearing is

(a) Cochlea (b) Semicircular canal (c) Utriculus (d) Sacculus

94 ➤ 11. The organ of Corti is a structure present in

(a) External ear (b) Middle ear (c) Semicircular canal (d) Cochlea

95 ➤ 12. While travelling to higher altitudes, people can feel pain in the ear and dizziness. Which part, among the following causes such complications?

(a) Cochlea, ear ossicles (b) Tympanic membrane (c) Eustachian tube, utricle, saccule and semicircular canals (d) None of these

Your Score is

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