In our body neyve ampulier are genuld
and conducted by active Transport o ions."
Justify the statement with suitable explanation.
Answers
A. Propagates an action potential by pumping sodium ions across the membrane out of the neurone. ... Establishes the resting potential needed for the transmission of an impulse by pumping sodium and potassium ions across the membrane.
Answer:
In our body nerve impulses are generated and conducted by active transport
of ions”. Justify the statement with suitable explanation.
Explanation:
Answer:
TRANSMISSION OF NERVE IMPULSE
Normal State/ Polarized State
In the normal (resting) condition, the outer side of the nerve fiber carries positive (+) charge. This is called polarized state. At this state more Na+ ions are outside the the axon membrane.
On Stimulation (Depolarized State),
The axon membrane at the spot where stimulation takes place becomes more permeable to Na+ which move inwards and cause loss of Polarization, i.e., they become excited (depolarized state).
Repolarization
Meanwhile, the previous region become Repolarized due to active transport of Na+ ions again to the outside. (This transport is achieved by using energy thru ATP and its called ‘‘Sodium Pump’’).
‘‘Conduction of nerve impulse is a wave of depolarization followed by repolarization’’
Which means conduction of nerve impulse takes place by the movement of Na+ ions in and out of the axon membrane. While depolarization, Na+ ions move inside the membrane, and during repolarization they move outside the membrane due to the active transport of Na+ ions using energy thru ATP.
Hope this helps!
[In the attachment, ignore the movement of K+ ions for now, they move opposite to Na+ ions, that is, if Na+ ions move out they move in and vice Versa]