Nervous System Multiple Questions and Answers.
Exercise Questions ::
Human Physiology
| Answer: Option Answer: c |
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Explanation: Neurons are made up of three parts, i.e., cell body, dendrites, and axon. The
cell body consists of ribosomes and a cluster of endoplasmic reticulum, which is known as
Nissl bodies. |
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| Answer: Option Answer: a |
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| Explanation: |
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Explanation: Endoplasmic reticulum is not present in axons as it does not synthesize
protein. An axon contains mitochondria, neurofibril, and microtubule and the cytoplasm of
an axon is called axoplasm. |
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8. | Name the multipolar neuron which is located entirely within the central nervous system. |
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| A. | Motor neuron |
| B. | Efferent neuron |
| C. | Afferent neuron |
| D. | Interneuron |
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| Answer: Option Answer: d |
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| Explanation: |
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Explanation: Interneurons are the multipolar neurons, which are found within the CNS.
Motor neurons are also known as efferent neurons, they transfer signals from the CNS to
effector organs. |
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9. | Out of the following, which one does not affect the speed of conduction of nerve impulse. |
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| A. | No. of ganglia |
| B. | Myelin sheath |
| C. | Axon diameter |
| D. | Temperature |
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| Answer: Option Answer: a |
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| Explanation: |
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Explanation: The speed of conduction of nerve impulse depends upon three factors, i.e.,
myelin sheath, temperature, and axon diameter. Higher the temperature higher would be
the speed and also larger the diameter higher the speed. |
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