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प्रश्न
How does the human nervous system work? Explain.
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उत्तर
When the sense organs such as eyes, ears, nose, tongue or skin are affected in our body, they send message to the brain in the form of electrical impulses through the sensory neurons. The brain analyses this message and decides the action to be taken. The brain, then, sends out instructions to the muscles of the concerned body part through the motor neurons. The concerned body part, then, acts according to the instructions sent by the brain.
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संबंधित प्रश्न
The gap between two neurons is called a ______.
What is the need for a system of control and coordination in an organism?
Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.
The life processes in humans are controlled and regulated by :
(a) reproductive and endocrine systems
(b) respiratory and nervous systems
(c) endocrine and digestive systems
(d) nervous and endocrine systems
Fill in the blank:
The coloured part of eye is called _______.
State whether the following statement is true (T) or false (F):
Retina is present on the outer surface of the eye.
Name the following:
Flap like structure of outer ear.
Fill in the blank:
A neuron consists of ..................... and ...................
State whether the following statement is true (T) or false (F):
Cerebellum maintains the balance of the body.
Differentiate between following pair with reference to the aspect in bracket.
sympathetic nervous system and para – sympathetic nervous system (overall effect on body)
Name the following:
The peripheral matter of spinal nerve.
Match the terms of column I with those of column ll
| Column l | Column ll |
| (i) Lens | (a) Adjustment of light rays |
| (ii) Lachrymal gland | (b) Vision |
| (iii) Olfactory epithelium | (c) Secretion of tear |
| (iv) Cochlea | (d) Balance of the body |
| (v) Semicircular canal | (e) Hearing |
| (vi) Eyes | (f) Smell |
Give Reason:
Why injury to medulla oblongata results in death?
Differentiate between:
Cerebrum and Cerebellum.
What does the cerebellum of the brain control?
Short answer question
Give a reason - Injury to medulla oblongata may prove fatal.
The third ventricle of brain is connected to the fourth ventricle of brain through ______.
Vomiting centre is located in ______
Which of the following parts is joined by the corpus callosum?
Stimulation of nerves of the sympathetic nervous system ______.
