The "sodium-potassium pump" pumps ______.
1. sodium ions out and potassium ions in
2. sodium ions in and potassium ions out
3. sodium and potassium ions in
4. sodium and potassium ions out
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
Select the incorrect statement:
1. | Na+/K+ ATPase is an electrogenic pump that helps to maintain an electrochemical ionic gradient across axolemma. |
2. | At rest, axoplasm has lower ions concentration than ion concentration. |
3. | Brain stem comprises midbrain, pons, and medulla oblongata. |
4. | Thalamus part of the hindbrain is responsible for emotions like anger and rage. |
Which of the following structures or regions is
incorrectly paired with its function?
1. limbic system—screening of information between
the spinal cord and the brain; regulates arousal
and sleep
2. medulla oblongata—homeostatic control center
3. cerebellum—unconscious coordination of
movement and balance
4. corpus callosum—band of fibers connecting left
and right cerebral hemispheres
Receptor sites for neurotransmitters are located on the:
1. tips of axons
2. axon membranes in the regions of the nodes of Ranvier
3. postsynaptic membrane
4. presynaptic membrane
Mark the incorrect match:
1. |
Cerebral aqueduct |
→ |
A canal passes through the midbrain, connecting 3rd ventricle to 4th ventricle of brain. |
2. |
Corpus callosum |
→ |
Thick band of nerve fibres that divides the cerebral cortex lobes into left and right hemispheres. |
3. |
Limbic system |
→ |
The inner part of forebrain involved in the regulation of sexual behaviour. |
4. |
Pons |
→ |
Consist of fibre tracts that interconnect different regions of the brain. |
Cerebral aqueduct passes through the:
1. Mid brain
2. Diencephalon
3. Hind brain
4. Spinal cord
Read all statements carefully and identify the number of correct ones:
(a) Neural system provides an organised network of point-to-point connections for quick coordination.
(b) Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.
(c) Cerebral aqueduct passes through the midbrain.
(d) The hypothalamus contains centers that control respiration and gastric secretions.
1. One
2. Two
3. Three
4. Four
Restoration of resting potential of the membrane at the site of excitation is achieved by:-
1. Diffusion of K outside the membrane
2. Diffusion of Na outside the membrane
3. Diffusion of K inside the membrane
4. Diffusion of Na inside the membrane
Which of the following is/are controlled by the human brain ?
a. Balance of the body
b. Circadian rhythm of the body
c. Human behaviour
d. Functioning of heart and kidneys
1. Only d
2. a and d
3. a,b and c
4. a,b,c,d