An action potential for a given axon is:
1. different in size each time it occurs
2. always the same size
3. larger when the information is to be carried faster
4. smaller when information goes to a gland rather than a muscle

Area of the brain, most involved in maintaining the body's homeostasis, is:
1. medulla oblongata
2. cerebellum
3. pons
4. hypothalamus

Cerebral aqueduct passes through the:
1. Mid brain
2. Diencephalon
3. Hind brain
4. Spinal cord

The iris __________.
1. regulates light entrance through the pupil
2. refracts light rays
3. absorbs stray light rays
4. contains receptors for sight

Which of the following statements are true regarding
association areas of brain?

A. These are the largest areas of forebrain.

B. These are involved in the regulation of sexual
behaviour, expression of emotional reactions
and motivation.

C. These are responsible for complex functions like
intersensory association, memory and
communication.

D. It is a part of cerebral cortex.

1. A & B 

2. A, B & C

3. A, C & D 

4. A & C

Which part of the ear determines the pitch of the sound?
1. Reissner’s membrane.
2. Basilar membrane.
3. Tectorial membrane.
4. Hair cells.

Assertion: Ear is a stato Acoustic organ.

Reason: Ear is related to hearing & balance.

Assertion: Neural signals through the parasympathetic nerves can increase the cardiac output.

Reason: Parasympathetic neurons stimulation can increase the activities of SA node and strength
             of ventricular contraction.

Which of the following statements is correct?

Vertebrate brain differentiates from:

1. endoderm

2. mesoderm

3. ectoderm

4. blastoderm