Question

Give the function of each of the following:
(a) Olfactory nerve
(b) Optic nerve
(c) Facial nerve

Answer 1

Hint: The nervous system is a network of nerves and cells that send and receive messages from the brain and spinal cord to other regions of the body. The Central Nervous System and the Peripheral Nervous System are both parts of the nervous system. The brain and spinal cord make up the central nervous system, while the Somatic and Autonomic nervous systems make up the peripheral nervous system.

Complete answer:
Our nervous system is the control centre of our body. Our emotions, thoughts, and automatic responses to the world around us are all controlled by this system, which originates in your brain.

Now, let us discuss some different types of nerve;
(a) Olfactory nerve: The olfactory receptor neurons' afferent nerve fibres convey odour-related nerve impulses to the central nervous system, where they are experienced via the sense of smell (olfaction).
(b) Optic nerve: The optic nerve is a nerve that runs through the back of the eye. The second cranial nerve is also known as cranial nerve II. It's the second of several cranial nerve pairs. The optic nerve's purpose is to transmit visual information from the retina to the brain's vision centres via electrical impulses.
(c) Facial nerve: The seventh cranial nerve is also known as the facial nerve (CN7). This nerve has two primary roles. It transmits sensory information from the tongue and the mouth's interior. CN7 is responsible for around two-thirds of the tongue's tip. The nerve originates in the brain stem and finishes in the pons and medulla. This nerve also controls the contraction and production of facial expressions via innervating facial muscles.

Note: Without the Nervous System to coordinate all of these tasks, walking, breathing, and thinking would be impossible. It is known as the "director of the choir" since it brings together all functions and components of the body to execute difficult tasks.