Question

12. Distinguish between:
(a) afferent neurons and efferent neurons
(b) impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
(c) aqueous humor and vitreous humor
(d) blind spot and yellow spot
(1) cranial nerves and spinal nerves.​

Answer 1

Answer:

Cranial nerves are the nerves that emerge directly from the brain (including the brainstem). In contrast, spinal nerves emerge from segments of the spinal cord. Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck.

Answer 2

Answer:

) Afferent neurons and efferent neurons

Afferent neurons

Efferent neurons

Afferent neuron conducts nerve impulses toward the brain or the spinal cord.

Efferent neuron conducts nerve impulses from the brain or spinal cord to the effector organs such as muscles or glands.