Multiple Choice Questions

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A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-D.

  • A – Receptor

    C – Synaptic vesicles

  • B – Synaptic connection

     D- K+

  • A – Neurotransmitter

    B- Synaptic  cleft

  • A – Neurotransmitter

    B- Synaptic  cleft


A.

A – Receptor

C – Synaptic vesicles

A - receptor, B - synaptic cleft, C - synaptic vesicles and D - Ca2+

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Destruction of the anterior horn cells of the spinal cord would result in loss of

  • Sensory impulses

  • Voluntary motor impulses

  • Commissural impulses

  • Commissural impulses

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Photosensitive compound in human eye is made up of

  • opsin and Retinal

  • opsin ans Retinol

  • transducin and Retinene

  • transducin and Retinene

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Injury localised to the hypothalamus would most likely disrupt

  • short term memory

  • coordination during locomotion

  • executive function, such as decision making 

  • executive function, such as decision making 

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Parts A, B, C and D of the human eyes are shown in the diagram. Select the option, which gives correct identification along with its functions/ characteristics

  • A - retina - contains photoreceptors -rods and cones

  • B-blind spot- has only a few rods and cones

  • C - aqueous chamber - reflects the light which does not pass through the lens

  • C - aqueous chamber - reflects the light which does not pass through the lens

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Which part of the human ear plays no role in hearing as such but is otherwise very much required?

  • Eustachian tube

  • Organ of corti

  • Vestibular apparatus

  • Vestibular apparatus

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How do parasympathetic neural signals affect the working of the heart?

  • Reduce both heart rate and cardiac output

  • heart rate is increased without affecting the cardiac output

  • Both heart rate and cardiac output increase

  • Both heart rate and cardiac output increase

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The human hind brain comprises three parts, one of which is

  • spinal cord

  • corpus callosum

  • Cerebellum

  • Cerebellum

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The most abundant intracellular cation is

  • Na+

  • Ca2+

  • H+

  • H+

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

  • high density of cones occur, but has no rods.

  • the optic nerve leaves the eye.

  • only rods are present

  • only rods are present

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