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प्रश्न
At the end of repolarization, the nerve membrane gets hyperpolarized. Why?
उत्तर
At the end of repolarization, the membrane potential inside the axolemma becomes negative due to the efflux of K+ ions. When it becomes more negative than the resting potential − 70 mV to about – 90 mV, it becomes hyperpolarised.
संबंधित प्रश्न
Receptor, Spinal cord, Effector, Motor neuron, Sensory neuron.
With the help of a suitable diagram describe the structures of a neuron.
Describe three kinds of nerves, giving the example of each.
Fill in the blank:
Basic structural unit of the nervous system is the________.
Given below is a structure, write its special functional activity.
Myelin sheath and ……………
Write the function of synapse.
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Repolarisation - Depolarisation - Resting (polarised) (during conduction of nerve impulse through a nerve fibre)
Identify the ODD term in each set and name the CATEGORY to which the remaining three belong :
Axon, Dendron, Photon, Cyton
Name the following:
Structural and metabolic unit of nervous tissue.
Name the following:
Neuron only with axon.
Differentiate between:
Rods and Cones.
Which of the following statements is wrong regarding conduction of nerve impulse?
A neuron contains all cell organelles except ______.
How nerve impulses are transferred from one neuron to the next neuron?
Each branch of the axon terminates as a bulb-like structure called ______
CNS is mostly made of ______
Rearrange the following in the correct order of involvement in electrical impulse movement-
Synaptic knob, dendrites, cell body, Axon terminal, Axon
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)
Give reason:
Neurotransmitters are broken down by an enzyme just after passing an impulse from one neuron to the other.
