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प्रश्न
Which of the following statements about transmission of nerve impulse is incorrect?
विकल्प
Nerve impulse travels from dendritic end towards axonal end
At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron
The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron
A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells
उत्तर
At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron
Explanation -
Axonal end contains vesicle filled with a chemical called "neurotransmitter" which cross the gap or synapse and generate electrical impulse at the dendrite of another neuron.
APPEARS IN
संबंधित प्रश्न
Mention the exact location of Malleus
Describe three kinds of nerves, giving the example of each.
Differentiate between following pair with reference to the aspect in bracket.
Sensory nerve and motor nerve (direction of impulse carried)
Given below is a structure, write its special functional activity.
Myelin sheath and ……………
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Effector - Sensory neuron - Receptor - Motor neuron - Stimulus - Central nervous system Response (Reflex arc)
Explain the following term :
Association neuron
Write a short note.
Autonomic Nervous System
Compare and contrast.
Sympathetic Nervous System and Parasympathetic Nervous System
Bipolar neurons are found in ______
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?
What are the gaps between adjacent myelin sheaths called?
Select the motor nerves from the following group.
Which nerves transmit impulses from the central nervous system towards muscle cells?
Electrical impulse travels in a neuron from
Identify the parts of a neuron which help the nerve impulse to travel towards the cell body.
Write one word for the following:
Long thread-like part of the nerve cell.
Nissl's granules are found in the cytoplasm of ______.
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Axon endings - Dendrites - Axon - Perikaryon - Dendron (Neuron structur)
Distinguish between the following pair:
Nerve impulse and flow of electricity (transmission and speed)
