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प्रश्न
Answer the following questions briefly:
Explain how the human eye adapts itself to bright light and dim light.
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उत्तर
The amount of light intering the eye is controlled by muscles of iris. The pupil become layer in less light to allow more light to goin and in bright light it consiricts to restrict the amount of light going in.
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संबंधित प्रश्न
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.
Draw the structure of a neuron.
Name the three types of nerves which constitute the peripheral nervous system.
What are the main organs of the human nervous system?
The spinal cord originates from:
what do we refer to in the nervous system when we say:
somatic and autonomic …………………..
Complete the following table by filling in the blank spaces.
| Structure | Function |
| Yellow Spot | |
| Transfers impulse from inner ear to brain | |
| Helps to change the focal length of the eye lens | |
| Spinal cord | |
| Oval window | |
| Dynamic equilibrium |
Differentiate between:
Cerebrum and Cerebellum.
Explain the Term: Ganglion
