Muscle Activity 1. The following group of incomplete statements begins with a de
ID: 3522475 • Letter: M
Question
Muscle Activity 1. The following group of incomplete statements begins with a description of a muscle fiber in the resting s before stimulation. Complete each statement by choosing the correct response from the key items. Key: a. Na" diffuses out of the cell g. relative ionic concentrations on the two sidas of the membrane electrical conditions b. c. d. e. f. K' diffuses out of the cell Na' diffuses into the cell K' diffuses into the cell inside the cell outside the cell h. i. activation of the sodium-potassium pump, which moves K' into the cell and Na out of the cell j. activation of the sodium-potassium pump, which moves Na into the cell and K' out of the cell ; there is a greater concentration of K There is a greater concentration of Na When the stimulus is delivered, the permeability of the membrane at that point is changed: and the depolarization of the membrane. Almost as soon as the depolarization wave has begun, a repolarization wave follows it across the membrane. This occurs as cell membrane.The initiating Repolarization restores the of the resting is (are) reestablished byExplanation / Answer
Suitable words or key items to fill the given incomplete statement are highlighted as bold letters :-
There is a greater concentration of Na+ outside the cell ; there is a greater concentration of K+ inside the cell. When the stimulus is delivered, the permeability of the membrane at that point is changed ; and Na+ diffuses into the cell, initiating the depolarisation of the membrane. Almost as soon as the depolarisation wave has begun, a repolarisation wave follows it across the membrane.This occurs as K+ diffuses out the cell. Repolarisation restores the electrical conditions of the resting cell membrane. The relative ionic concentrations on the two sides of the membrane is re-established by activation of sodium-potassium ion pump which moves K+ into the cell and Na+ out of the cell.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.