Advertisements
Advertisements
प्रश्न
What happens at the synapse between two neurons?
उत्तर
A very small gap that occurs between the last portion of the axon of one neuron and the dendrite of the other neuron is known as a synapse. It acts as a one-way valve to transmit impulses in one direction only.
This one-directional transfer of impulses occurs as the chemicals are produced on only one side of the neuron, i.e., the axon’s side. From the axon, the impulses travel across the synapse to the dendrite of the other neuron.
APPEARS IN
संबंधित प्रश्न
What is the need for a system of control and coordination in an organism?
What is the long fibre of a neuron known as?
What is voluntary nervous system? Explain the working of the voluntary nervous system with an example.
What is a synapse?
What are nerves?
With the help of a suitable diagram describe the structure of a neuron.
Fill in the blank:
Basic structural unit of the nervous system is the ..................
Mention if the following statement is true (T) or false (F) Give reason.
Flavour and taste are one and the same thing.
Name the following :
(i) The layer of the eyeball that provides nourishment to the eye.
Distinguish between the following pair of words:
Nerve cell and neuroglia cell
Choose the correct answer.
More than one foot long cells of the body are __________
Give Technical Term:
The receptors which help in the sensation of taste.
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
Draw the neat labelled diagram of L. S. of the human brain.
The outermost of the three cranial meninges are ______
Which acts as a link between the nervous system and endocrine system?
The cerebrum controls the voluntary actions of our body.
What is the third ventricle called?
All of the following are true for human brain, EXCEPT ______.
Nervous system is well developed in human and is composed of ______ or ______.
