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प्रश्न
How nerve impulses are transferred from one neuron to the next neuron?
उत्तर
All the information from the environment is detected by the receptors, located in the sense organs such as the eyes, nose, skin and etc. Information from the receptors is transmitted as an electrical impulse and is received by the dendritic tips of the neuron. This impulse travels from the dendrite to the cell body and then along the axon to its terminal end. On reaching the axonal end, it causes the nerve endings to release a chemical (neurotransmitter) that diffuses across a synapse and starts a similar electrical impulse in the dendrites of the next neuron, then to their cell body to be carried along the axon.
The electrical signal reaches the brain or spinal cord. The response from the brain (or spinal cord) is similarly passed on to the effector organs such as the muscle or gland cell, that undergoes the desired response.
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संबंधित प्रश्न
Renal cortex and Renal medulla [Parts of the nephrons present]
Fill in the blank:
The neurons carrying impulses from the brain to the muscles are called _______________________.
Define the term Sensory neuron.
Mention the types of nerves found in humans.
what do we refer to in the nervous system when we say:
sensory, motors and association ……………….
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)
Draw a labeled diagram of a myelinated neuron.
During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.
Bipolar neurons are found in ______
‘A’ is a cylindrical structure that begins from the lower end of the medulla and extends downwards. It is enclosed in bony cage ‘B’ and covered by membranes ‘C’. As many as ‘D’ pairs of nerves arise from the structure ‘A’.
(i) What is A?
(ii) Name (a) bony cage ‘B’ and (b) membranes ‘C’
(iii) How much is D?
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?
The structural and functional units of the nervous system is ______.
Electrical impulse travels in a neuron from
Which of the following statements about transmission of nerve impulse is incorrect?
CNS is mostly made of ______
Identify the parts of a neuron which help the nerve impulse to travel away from the cell body.
Write one word for the following:
wave of electrical disturbance that sweeps over the nerve cell.
Name the following:
Three types of neurons
