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प्रश्न
Our body contains a large number of cells ‘L’ which are the longest cells in the body. L has long and short branches called ‘M’ and ‘N’ respectively. There is a gap ‘O’ between two ‘L’ cells, through which nerve impulse transfer by the release of chemical substance ‘P’.
(i) Name the cells L?
(ii) What are M and N?
(iii) What is the gap O?
(iv) Name the chemical substance P?
उत्तर
- Neuron
- Axon and Dendrites
- Synaptic Junction (knob)
- Neurotransmitter (Acetylcholine)
APPEARS IN
संबंधित प्रश्न
Differentiate between Myelinated and non-myelinated axons.
Distinguish between Impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
Renal cortex and Renal medulla [Parts of the nephrons present]
The diagram given below is a representation of a certain phenomenon pertaining to the nervous system. Study the diagram and answer the following questions:
(i) Name the phenomenon which is being depicted.
(ii) Give the technical term for the point of contact between the two nerve cells.
(iii) Name the parts 1, 2, 3, and 4.
(iv) Write the functions of parts 5 and 6
(v) How does the arrangement of neurons in the spinal cord differ from that of the brain?
The number of Spinal nerves in a human being are :
(A) 31 pairs
(B) 10 pairs
(C) 21 pairs
(D) 30 pairs
Mention the exact location of Hydathodes
Fill in the blanks:
A neuron consists of ________ , _________ and ________.
Define the term Neuron.
Differentiate between following pair with reference to the aspect in bracket.
Sensory nerve and motor nerve (direction of impulse carried)
Name the following:
The third neuron that is involved in reflexes, other than simple reflex.
How does an impulse travel across a synapse?
______ is the longest cell in our body.
A neuron contains all cell organelles except ______.
Which type of neuroglial cells are depicted in the given diagram?
As compare to medullated nerves, the conduction of impulse by non-medullated nerve fibres is ______ times faster.
Electrical impulse travels in a neuron from
In a synapse, chemical signal is transmitted from
Rearrange the following in the correct order of involvement in electrical impulse movement-
Synaptic knob, dendrites, cell body, Axon terminal, Axon
The basic structural and functional unit of brain is ______.
