NEURAL CONTROL AND COORDINATION

 

Q51.The transparent lens in the human eye is held in its place by

(1) Ligaments attached to the ciliary body

(2) Ligaments attached to the iris 

(3) Smooth muscles attached to the ciliary body 

(4) Smooth muscles attached to the iris

Ans.1

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Q52.Myelin sheath is produced by 

(1) Schwann Cells and Oligodendrocytes

(2) Astrocytes and Schwann Cells 

(3) Oligodendrocytes and Osteoclasts 

(4) Osteoclasts and Astrocytes for 

Ans.1

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Q53.Receptor sites for neurotransmitters are present on 

(1) Membranes of synaptic vesicles

(2) Pre-synaptic membrane 

(3) Tips of axons 

(4) Post-synaptic membrane 

Ans.4

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Q54.Good vision depends on adequate intake of carotene rich food. Select the best option from the following statement

(a) Vitamin A decatives are formed from carotene 

(b) The photopigments are embedded in the membrane discs of the inner segment

(c) Retinal is a derivative of vitamin A  

(d) Retinal is a light absorbing part of all the visual photopigments 

(1) (a)&(b)

(2) (a),(c)&(d)

(3) (a)&(c)

(4) (b),(c)&(d)

Ans.2

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Q55.Choose the correct statements 

(1) Nociceptors respond to changes in pressure 

(2) Meissner's corpuscles are thermoreceptors 

(3) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus 

(4) Receptors do not produce graded potentials 

Ans.3

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Q56.Photosensitive compound in human eye is made up of 

(1) Transducin and Retinene  

(2) Guanosine and Retinol 

(3) Opsin and Retinal 

(4) Opsin and Retinal 

Ans.3

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Q57.In mammalian eye, the fovea is the center of the visual field, where 

(1) More rods than cones are found 

(2) High density of cones occur, but has no rods 

(3) The optic nerve lees the eye 

(4) Orily rods are present 

Ans.2

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Q58.Destruction of the anterior hom cells of the spinal cord would result in loss of 

(1) Integrating impulses 

(2) Sensory impulses 

(3) Voluntary motor impulses 

(4) Commissural impulses 

Ans.3

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Q59.A gymnast is able to balance his body upside down even in the trial darkness because of 

(1) Organ of cott  

(2) Cochlea

(3) Vestibular apparatus 

(4) Tectorial membrane 

Ans.3

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Q60.Which of the following regions of the bran, incorrectly paired with its function?

(1) Cerebrum-calculation and contemplation 

(2) Medulla oblongata-homeostatic control

(3) Cerebellum-language comprehension

(4) Corpus callosum-communication between the left and the right cerebral cortices 

Ans.3

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