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Somatic and A...

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Somatic and Autonomic neural system is made up of only Efferent nerve fibre or both Efferent and Afferent nerve fibre?

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Q. Which of the following statement(s) is/are true?
1. Somatic neural system transmit impulses from CNS to skeletal muscles.
2. Autonomic neural system transmits impulses from CNS to involuntary organs and smooth muscles.
3. Unmyelinated nerve fibres are found in spinal and cranial nerves
4. Myelinated nerve fibres are found in autonomous and the somatic neural systems.

Q. What is the difference between efferent nerves and afferent nerves?

Identify the incorrect statement(s) regarding the components of PNS.

I. The nerves carrying impulses from CNS to peripheral system are sensory nerves or afferent nerves

II. The nerves carrying impulses from peripheral system to CNS are motor nerves or efferent nerves

III. Afferent nerves bring in impulses from the auditory, visual and touch receptors.

IV. Efferent nerves coordinates impulses towards effector organs.

Give the function of

(a) Afferent nerves

(b) Efferent nerves

Q. Efferent nerve fibres conduct nerve impulses from the CNS to the effector organs such as muscles and glands.

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