Neural Control and Coordination

Which of the following is the part of mid brain of rabbit?

• Diencephalon

• Cerebrum

• Corpora quadrigemina

• None of the above

Assertion : The imbalance in the concentration of Na⁺, K⁺ and proteins generates the resting potential.

Reason : To maintain the unequal distribution of Na⁺ and K⁺, the neurons use electrical energy.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both the assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both the assertion and reason are false.

Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that

• nerve fibre is insulated by a medullary sheath

• sodium pump starts operating only at the cyton and then continues into the nerve fibre

• neurotransmitters are released by dendrites and not by axon endings

• neurotransmitters are released by the axon endings and not by dendrites.

Now-a-days cornea transplantation is very popular. The reason is that it

• is easy to preserve

• transplanted very easily

• can be easily obtained

• does not link with blood supply and immune system

Ventricles are related to

• heart only

• brain only

• both 'a' and 'b'

• none of these

Organ of Corti is found in

• heart

• kidneys

• inner ear

• nasal chamber

Sella Turcica is found

• in bones

• in joints

• nearby pituitary

• nearby thyroid

If a stimulus, several times greater than the threshold stimulus is provided to a muscle fibre, it will

• contract with a larger force

• contract with a smaller force

• contract with the same force

• undergo tetany.

The total number of nitrogenous bases in human genome is estimated to be about

• 3.5 million

• 35 thousand

• 35 million

• 3.1 billion.

A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed

• on the blind spot

• behind the retina

• in front of the retina

• on the yellow spot