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प्रश्न
Distinguish between the following pair of words:
Nerve cell and neuroglia cell
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उत्तर
| Nerve cell | Neuroglia cell |
| These are the conducting cells in the nervous system which conduct impulses. | These are not the conducting cells but are helper cells to the nerve cells or neurons. |
संबंधित प्रश्न
State the different types of neurons.
The human body contains a large number of cells A which are very long and branched, and look like electric wires. The longest branch of this cell is B whereas there are many small branches C. Any two A cells do not join to one another completely in the human body. There is a microscopic gap D between every pair of adjacent A cells through which electric impulses can pass by the release of a chemical substance.
(a) What are cells A?
(b) What is the name of (i) branch B, and (ii) branches C?
(c) What is the microscopic gap D known as?
(d) What is the function of cells like A in the human body?
(e) The cells A are of three types. name the three types.
State whether the following statement is true (T) or false (F):
The largest part of the brain is the cerebrum.
Define the following:
Reflex arc
Answer the following questions briefly:
Explain how the human eye adapts itself to bright light and dim light.
Define the following:
Action potential
Mention, if the following statement is True or False
The nerve impulse in the eye develops due to the chemical changes brought about in the sensitive cells (rods and cones) by the light energy of the image.
Complete the following sentence with appropriate Word
The function of nervous system is to:
Nervous system is well developed in human and is composed of ______ or ______.
“Nervous and hormonal systems together perform the function of control and coordination in human beings.” Justify the statement.
