Explanation:
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Answer:
1) True
Explanation:
Cells of Sinoatrial (SA) node make up the auto rhythmic cells of heart as in normal physiological conditions , SA-node is responsible to set the pace of the rest of the heart (pacemaker) at a rate of 70 to 80 beats per minute.
The cells of SA node has the ability to self-excite thus able to generate action potential without external stimulation by nerve cells. Thus they initiate the cardiac cycle providing the conduction system.
Hence the statement , SA nodal cells are unique in that they exhibit autorhythmicity, meaning they are capable of depolarizing and firing an action potential spontaneously without any external influence, is true.
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The answer is: ATP generated by oxidative or aerobic catabolism
Tetanus causes the continuous
contraction of muscles, a condition known as
rhabdomyolysis, that leads to depletion of oxygen in the body. Without that oxygen, the mitochondria in our cells can't make aerobic respiration, which produces a lot of ATP molecules. That's the reason why ATP is depleted.
