Answer: Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract
Answer: You can monitor your exercise intensity by using any of the three main test methods: measuring your heart rate, doing the talk test, or checking your rating of perceived exertion
Explanation:
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Answer:
The inward flow of sodium ions increases the concentration of positively charged cations in the cell and causes depolarization, where the potential of the cell is higher than the cell's resting potential. The sodium channels close at the peak of the action potential, while potassium continues to leave the cell.
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