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Organisation of the PNS

Efferent nerv...

Question

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

A

False

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B

True

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Solution

The correct option is B True

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

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.

Q. Afferent nerve fibres conduct nerve impulses from the sensory organs to the CNS. Hence, it is also known as sensory nerve fibre.

Q. Assertion: Motor neurons are efferent neurons.
Reason: Motor neurons conduct nerve impulses from effector organs to the brain.

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.

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