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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
Distinguish between Cranial nerves and spinal nerves.
Identify the odd one in each set : Cyton, Photon, Axon, Dendron
Fill in the blank:
Basic structural unit of the nervous system is the________.
Define the term Neuron.
Describe the two parts of the nervous system.
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)
Name the following:
The third neuron that is involved in reflexes, other than simple reflex.
Differentiate between:
A Sensory neuron and a Motor neuron (function)
Draw a labeled diagram of a myelinated neuron.
Assertion: The imbalance in concentration of Na+, K+ and proteins generates action potential.
Reason: To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
When the potential across the axon membrane is more negative than the normal resting potential, the neuron is said to be in a state of ______.
Which type of neuroglial cells are depicted in the given diagram?
Identify the INCORRECT statement regarding multipolar neuron.
A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called ____________.
Electrical impulse travels in a neuron from
Chemicals which are released at the synaptic junction are called ______.
In the following diagram choose the correct labelling for A, B, C, D and E respectively.
Write one word for the following:
The kind of nerve carrying impulses from the brain to a gland or muscle.
Any factor that can bring a change in the body of an organism is called ______.
Define the following term:
Synaptic cleft
