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प्रश्न
Answer the following questions briefly:
Explain how the human eye adapts itself to bright light and dim light.
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
Electrical impulse travels in a neuron from:
Find the odd-one out, giving reasons:
Pinna, eardrum, cochlea, ear canal
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 |
Explain the Term: Reflex action
How many pairs of cervical spinal nerves are present in humans?
Subdural space is present between (i)____________ and (ii)____________.
There are ____________ lumbar spinal nerves.
Which of the following is the correct description of Gyri and sulci?
All of the following are true for human brain, EXCEPT ______.
Nervous system is well developed in human and is composed of ______ or ______.
