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Nervous System

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Which is the most excitable part of a neuron?

  1. Cyton

  2. Axon hillock

  3. Initial segment of axon

  4. Axon


Correct Option: C
Explanation:

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Which of the following is a short-lasting event in which the electric membrane potential of the nerve cells rapidly rises and falls following a consistent path?

  1. Resting potential

  2. Action potential

  3. Reverse potential

  4. Threshold potential


Correct Option: B
Explanation:

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______ regulates the autonomic nervous system within the brain.

  1. Hippocampus

  2. Hypothalamus

  3. Thalamus

  4. Medulla


Correct Option: B
Explanation:

Hypothalamus regulates ANS.  

Which type of nerve secretes acetylcholine?

  1. Spinal nerve

  2. Cranial nerve

  3. Parasympathetic nerve

  4. Sympathetic nerve


Correct Option: C
Explanation:

Nerve endings of parasympathetic system secrete acetylcholine.

Which sympathetic nerve supplies to stomach?

  1. Posterior vagal trunk

  2. Greater splanchnic nerve

  3. Right phrenic nerve

  4. Lumbar splanchnic nerve


Correct Option: B
Explanation:

Greater splanchnic nerve is a sympathetic nerve which supplies to stomach.

Which nervous system is involved in the process of facilitating accommodation and allowing closer vision?

  1. Sympathetic nervous system

  2. Parasympathetic nervous system

  3. Somatic peripheral nervous system

  4. Central nervous system


Correct Option: B
Explanation:

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What would happen if the brain is deprived of blood flow for 1-2 minutes?

  1. Unconsciousness

  2. Weakening of brain cells

  3. Permanent injury of nerves

  4. Nothing would happen


Correct Option: B
Explanation:

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What is the fast movement of action potential from node to node called?

  1. Synaptic transmission

  2. Saltatory transmission

  3. Co-transmission

  4. Summation


Correct Option: B
Explanation:

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Which of the following is an incorrect statement?

  1. Spinal cord is covered with meninges.

  2. The postanglionic neurons originate from the thoracolumbar region of the spinal cord.

  3. The space between axon and dendrite is called synaptic cleft.

  4. The nerve impulse obeys the all or none principle like muscles.


Correct Option: B
Explanation:

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Nerve impulses are generated by

  1. Na+ K+ pump

  2. Na+ Cl- pump

  3. Ca++ Na+ pump

  4. Ca++ K+ pump


Correct Option: A
Explanation:

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Which of the following correctly represents the path of flow of nerve impulse?

  1. Neuron - Cyton - Axon

  2. Axon - Cyton - Dendrites

  3. Cyton - Dendrites - Axon

  4. Axon - Dendrites - Cyton


Correct Option: B
Explanation:

Impulses flow from axons to cytons to dendrites.

What do we call the period for which a nerve does not transmit another impulse?

  1. Resting potential

  2. Repolarisation

  3. Refractory period

  4. Depolarisation


Correct Option: C
Explanation:

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What is the critical level to which the membrane potential must be depolarised in order to initiate an action potential?

  1. Depolarisation

  2. Resting potential

  3. Threshold potential

  4. Refractory period


Correct Option: C
Explanation:

The threshold potential is the critical level to which the membrane potential must be depolarised in order to initiate an action potential.

What do we call the difference in the distribution of electric charges outside and inside of plasma membrane of nerve?

  1. Action potential

  2. Resting potential

  3. Threshold potential

  4. Reverse potential


Correct Option: B
Explanation:

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In which process does the neural cells' internal charge become positive?

  1. Repolarisation

  2. Depolarisation

  3. Nerve impulse

  4. Refractory period


Correct Option: B
Explanation:

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