Advertisements
Advertisements
Questions
State the Function:
Myelin sheath
State the functions of the following:
Myelin sheath
Advertisements
Solution
The myelin sheath covers the axon of a nerve cell, provides insulation and prevents indiscriminate distribution and leakage of nerve impulses.
APPEARS IN
RELATED QUESTIONS
How are the messages carried across a synapse? Explain with the help of a labelled diagram.
The organ A which is located inside the skull of our body is protected by a bony shell B. It is surrounded by three layers membranes C. The spaces between these layers are filled with a liquid D which protects organ A from mechanical shocks. Organ A in combination with another organ E makes up the central nervous system.
(a) What is organ A?
(b) What are B, C and D?
(c) Name the organ E.
(d) While walking barefoot, if we happen to step on a sharp piece of stone, we immediately lift our foot up. Which of the two organs: A or E, is directly involved in this action?
(e) If we step out from a darkened room into bright sunlight, we close our eyes for a moment. Which of the two organs: A or E, is directly involved in this action?
Fill in the blank:
Peripheral nervous system consists of _________.
Explain the structure of the brain.
Differentiate between following pair with reference to the aspect in bracket.
sympathetic nervous system and para – sympathetic nervous system (overall effect on body)
Distinguish between the following pair of words:
Nervous system and hormonal system
Give Reason:
Why injury to medulla oblongata results in death?
Explain the Term: Natural reflex
Complete the following sentence with appropriate word :
There are _______ neurons in our body.
Stimulation of nerves of the sympathetic nervous system ______.
