Well, we know that a lot of the ancient civilizations were first-handedly affected by disease. For example, Native Americans were severely impacted by the spread of pestilence. 90% of their population was completely killed off. I think that would be enough to concern them, don't you think? :P
Answer:
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Explanation:
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Answer:
The correct answer choice for the question: The popliteal pulse point is found on the anterior surface of the elbow, would be, A: true.
Explanation:
The popliteal pulse is the passage point of the brachial artery and it is in fact always found on the anterior surface of the elbow, medial to the tendons of the biceps. This major artery, the brachial artery, is the main vessel for the upper arms and it comes out of the axillary artery. As it tranverses down the upper arms, it reaches the cubital fossa of the elbow, where it divides into the radial and the ulnar arteries. When measuring blood pressure, it is usually this artery that is sought out and its sounds can be heard with a sthetoscope, and when using a sphygmomanometer, or blood presure cuff.
Answer: D) precapillary sphincters relax.
Explanation:
Blood flow to a tissue will decrease if precapillary sphincters relax as, capillaries provides glucose and oxygen to the cells and allows blood to flow through it when the muscle ring known as the precapillary Sphincters get relaxed. The blood flow is stopped when the precapillary sphincters constrict flow of blood. As, certain chemical signals causes feeder arterioles to dilate and bring more blood into local areas then, it causes precapillary sphincters to relax.
