The process of heart contraction stimulates by the initiation of an electrical impulse. This electrical impulse starts in the SA node.
<h3>What is the Heart contraction?</h3>
Heart contraction may be defined as a type of physiological activity that stimulates electrical impulses which are initiated by the sinoatrial node. Systole is significantly the contraction phase of the cardiac cycle.
The SA node is a small bundle of specialized cells that is remarkably located in the right atrium. The electrical activity escalates through the walls of the atria and induces them to contract. This action finally forces blood into the ventricles.
Therefore, the SA node is responsible for the initiation of impulses that stimulates heart contraction.
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1. protein
2. essential amino acids
3. complete proteins
4. incomplete proteins
Answer:
False
Explanation:
A cardio-respiratory endurance activity, or aerobic exercise, should help you build up stamina to be able to do a physical activity for longer. It helps you train your body, lungs, and heart to use oxygen more efficiently.
Some examples are distance running, swimming, brisk walking and cycling.
A short, 25 yard sprint won't help you build up endurance, because it only lasts for 25 yards. It is an example of an anaerobic exercise, which is when you preform an exercise with maximum effort for a short period of time.
Therefore, this is false, a short sprint is not an example of a cardio-respiratory endurance activity.
