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प्रश्न
Which of the following statements is wrong regarding conduction of nerve impulse?
पर्याय
In a resting neuron, the axonal membrane is more permeable to K+ ions and nearly impermeable to Na+ ions.
Fluid outside the axon has a high concentration of Na+ ions and low concentration of K+, in a resting neuron.
Ionic gradient s are maintained by Na+ K+ pumps across the resting membrane, which transport 3Na ions outwards for 2K+ into the cell.
A neuron is polarized only when the outer surface of the axonal membrane possess a negative a charge and its inner surface is positively charged.
उत्तर
A neuron is polarized only when the outer surface of the axonal membrane possess a negative a charge and its inner surface is positively charged.
संबंधित प्रश्न
Briefly explain the following terms: Synapse
Draw neat and labelled diagrams of a myelinated neuron
Identify the odd one in each set : Cyton, Photon, Axon, Dendron
The diagram given below is a representation of a certain phenomenon pertaining to the nervous system. Study the diagram and answer the following questions:
(i) Name the phenomenon which is being depicted.
(ii) Give the technical term for the point of contact between the two nerve cells.
(iii) Name the parts 1, 2, 3, and 4.
(iv) Write the functions of parts 5 and 6
(v) How does the arrangement of neurons in the spinal cord differ from that of the brain?
The number of Spinal nerves in a human being are :
(A) 31 pairs
(B) 10 pairs
(C) 21 pairs
(D) 30 pairs
Mention the exact location of the Lacrimal gland
With the help of a suitable diagram describe the structures of a neuron.
Fill in the blank:
Basic structural unit of the nervous system is the________.
State whether the following statement is true (T) or false (F):
Each neuron consists of three parts called cell body, cyton and axon.
Write the function of medullary sheath.
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)
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
axon endings → nucleus → Dendrites → axon → perikaryon → Dendron(Neutron structure)
All of the following are associated with the myeline sheath except
What does the neural tissue consist of?
Axons ____________.
______ is the gap between the axon of one terminal neuron and the dendrites of next neuron.
The longest fibre on the cell body of a neuron is called ____________.
Electrical impulse travels in a neuron from
Nissl's granules are found in the cytoplasm of ______.
