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प्रश्न
Define the following:
Action potential
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उत्तर
Action potential - A momentary change in electrical potential on the surface of a cell, or a nerve or muscle cell, that occurs when it is stimulated, resulting in the transmission of an electrical impulse.
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संबंधित प्रश्न
The gap between two neurons is called a ______.
Name the three components of a neuron (or nerve cell).
What is the function of receptors and effectors in our body?
What is cranium? What is its function?
Write one word in the space provided to complete the second pair of the related words pertaining to nervous system.
Memory : cerebrum : : breathing :
Balance : cerebellum : : reasoning :
Fill in the blank:
Outer protective layer of skin, called epidermis is made up of ________ tissue.
Fill in the blank:
The coloured part of eye is called _______.
Draw well labeled diagram of a ‘Neuron’ and name the following parts:
(1) Node of Ranvier (2) Nissil granules (3) Cyton
Explain the Term: Ganglion
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’.
| Column I | Column II | ||
| (i) | Auditory canal | (a) | Channels pressure waves of air into the middle ear. |
| (ii) | Auditory (Eustachian tube) | (b) | Collects pressure waves of air. |
| (iii) | Auditory nerve | (c) | Converts pressure waves of air into vibrations of bone. |
| (iv) | Incus | (d) | Dissipates sound waves. |
| (v) | Malleus | (e) | Equalizes pressure between the middle ear and the atmosphere. |
| (vi) | Oval window | (f) | Provide information about the spatial orientation of the head. |
| (vii) | Pinna | (g) | Transfers vibrations from a bone to a fluid. |
| (viii) | Round window | (h) | Transfers vibrations from a bone to a membrane. |
| (ix) | Semi-circular canal | (i) | Transfers vibrations from a bone to a bone. |
| (x) | Stapes | (j) | Transfers vibrations from a membrane to a bone. |
| (xi) | Tympanic membrane | (k) | Transmits action potential to the auditory cortex. |
