Biology

Biology, 18.07.2019 18:00, lakenyagillard79

Blood pressure is determined by which of the following components? the strength of heart contraction and blood type the strength of heart contraction and blood volume the strength of heart valve closure and blood type the strength of the heart valve closure and blood volume

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Physics, 10.09.2019 17:30, chimbali9736

The human circulatory system is closed - that is, the blood pumped out of the left ventricle of the heart into the arteries is constrained to a series of continuous, branching vessels as it passes through the capillaries and then into the veins as it returns to the heart. the blood in each of the hearts four chambers comes briefly to rest before it is ejected by contraction of the heart muscle. the contraction of the left ventricle lasts 250 ms and the speed of blood flow in the aorta (the large artery leaving the heart) is 0.80 m/s at the end of the contraction. what is the average acceleration of a red blood cell as it leaves the heart?

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Health, 23.09.2019 20:00, nyasiasaunders1234

Which of the following determines blood volume? -the strength of heart contraction -the amount of water in the blood -abo blood type and rh factor -heart rate and respiratory rate

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Biology, 05.10.2019 02:40, sleepypizza

The cardiovascular system performs four main functions: first, of the heart generate blood pressure, which moves blood through the . *second, the blood vessels blood from the heart into arteries, capillaries, and veins. then, blood returns to the heart to complete the . *third, gas occurs in the capillaries, where oxygen is dropped off for the cells, and coâ‚‚ and wastes are picked up. *finally, the heart and blood vessels blood flow, according to the needs of the body.

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Physics, 10.11.2019 04:31, lily1482

If you are lying down and stand up quickly, you can get dizzy or feel faint. this is because the blood vessels don’t have time to expand to compensate for the blood pressure drop. if your brain is 0.4 m higher than your heart when you are standing, how much lower is your blood pressure at your brain than it is at your heart? the density of blood plasma is about 1025 kg/m3 and a typical maximum (systolic) pressure of the blood at the heart is 120 mm of hg (= 0.16 atm = 16 kp = 1.6 × 104 n/m2).

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