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प्रश्न
Give function of astrocytes in nervous system.
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उत्तर
Astrocytes have varied roles in the brain, secretion and absorption of neural transmitter and maintenance of blood-brain barrier BBB. They also regulate the transmission of electrical impulses with the brain.
संबंधित प्रश्न
Compare the following:
Resting potential and action potential
Sketch and label formation of typical spinal nerve.
Which ions is the resting membrane more permeable to?
Under which of the following conditions will the ionic gradients across the resting membrane be maintained?
Which of the following is TRUE for the external tissue fluid in polarized state?
Identify the value of action potential.
During resting potential, the axonal membrane is polarised, indicate the movement of +ve and –ve ions leading to polarisation diagrammatically.
Complete the statement by choosing appropriate match among the following -
| a. Resting potential | i. Chemicals involved in the transmission of impulses at synapses. |
| b. Nerve impulse | ii. Gap between the pre synaptic and post synaptic neurons |
| c. Synaptic cleft | iii. Electrical potential difference across the resting neural membrane |
| d. Neurotransmitters | iv. An electrical wave like response of a neuron to a stimulation |
Write one word for the following:
Point of contact between two nerve cells.
During the phase of depolarisation of nerve impulse, ______.
