Answer- True. Q-Is there a question?
At the onset of a muscle contraction, the presence of calcium triggers the opening of the Na-K channels in the membrane. Potassium is a calcium inhibitor, so as the potassium flows out of the cell, it eventually reduces the presence of calcium. This causes the closure of the Na-K channel (negative feedback mechanism). In a hypokalemic state, the lack of sufficient K doesn't inhibit the calcium channel, and in turn doesn't properly terminate the muscle contraction at the cellular level.
Answer:Danielle and Bryan, college students, are developing romantic feelings for each other. They spend time together just talking about their past experiences, their hopes and fears, and the kind of persons they would like to become. Erikson would say they are demonstrating the key characteristics of Adolescence (Sexual orientation and Identity)
<h3>Answer:</h3><h2>C. Helps increase stamina when exercising. .</h2><h3>Explanation:</h3>
The purpose of cool down exercises is to reduce the heart rate at a very controlled pace. This regulation of the heartbeat allows the body to receive oxygenated blood at a gradually slower pace till it is accustomed to the lower heartbeat, as opposed to a sudden decrease in the heartbeat, which would cause movement of blood away from heart thereby resulting in lightheadedness.
