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Question
Define the following:
Nerve impulse
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Solution
Nerve impulse - It is an electrochemical change occurring in the membrane of a nerve fibre produced by a stimulus.
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RELATED QUESTIONS
Name the three components of a neuron (or nerve cell).
Fill in the blank:
The three main parts of the brain are ................................ and ............................
Define the following:
Motor neuron:
Complete the following sentence with appropriate word :
There are _______ neurons in our body.
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. |
Long answer question
Krishna was going to school and on the way, he saw a major bus accident. His heartbeat increased and hands and feet become cold. Name the part of the nervous system that had a role to play in this reaction.
Hypothalamus is the thermoregulatory centre of the human body.
A deep longitudinal fissure divides the telencephalon into ______.
What constitutes the central and peripheral nervous systems? How are the components of central nervous system protected?
Destruction of the anterior horn cells of the spinal cord would result in loss of ______.
