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Question

The wave of expansion of an artery when blood Is forced into it is called :
(a) flow
(b) heart beat
(c) pulse
(d) ticking


Solution

option (c) pulse
Pulse. This is a characteristic associated with the heartbeat and the subsequent wave of expansion and recoil set up in the wall of an artery. Pulse is defined as the alternate expansion and recoil of an artery. With each heartbeat, blood is forced into the arteries causing them to dilate (expand). Then the arteries contract (recoil) as the blood moves further along in the circulatory system. The pulse can be felt at certain points in the body where an artery lies close to the surface. The most common location for feeling the pulse is at the wrist, proximal to the thumb on the palm side of the hand (radial artery). Alternate locations are in front of the ear (temporal artery), at the side of the neck (carotid artery), and on the top (dorsum) of the foot (dorsalis pedis).

Biology
Science for Tenth Class - Part III - Biology
Standard X

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