1.

Photosensitive compound in human eye is made up of

• opsin and Retinal

• opsin ans Retinol

• transducin and Retinene

• transducin and Retinene

The most abundant intracellular cation is

• Na⁺

• Ca²⁺

• H⁺

• H⁺

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

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

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

• Sensory impulses

• Voluntary motor impulses

• Commissural impulses

• Commissural impulses

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

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

• spinal cord

• corpus callosum

• Cerebellum

• Cerebellum

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

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

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