10 practice

10 practice - Lesson 10 Practice Set The Vascular System...

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Lesson 10 Practice Set The Vascular System Part 1 The object here is to get oriented, remember some basic physiology, and put together some basic information. Fill in the blanks, please. Figure 1 Figure 2 Figure 1 above is a schematic of part of the circulatory system, specifically the ___________ (1) circulation. This part of the circulatory system provides blood to all of the body with the exception of the _______ (2), which are provided with blood primarily by the pulmonary circulation. Figure 2 illustrates blood pressures in the “in series” components of both the systemic and the pulmonary circulations. aorta arteries capillaries arterioles venules veins vena cava Pressure mm Hg 0 40 80 120 Relative resistance P systolic P diastolic Relative resistance 0 20 40 60 80 100 120 140 Pressure (mmHg) Left heart atrium ventricle Systemic circulation Pulmonary circulation Right heart
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Use both figures and your general knowledge to answer the following questions. Blood to the body is pumped out by the _______(3) ventricle into the aorta at a normal "blood pressure" of ____/____ (4) mmHg. The higher number is called the _________ (5) pressure while the lower number is called the _________ (6) pressure. For these pressures, MAP is ~ _____ (7) mmHg. Multiple arteries branch from the aorta. When we are in the recumbent position, the normal blood pressure in those arteries is also about _____/____(8) with a mean of ~_____ (9) mmHg. Arteries branch into smaller arteries and then into arterioles. Arterioles are high resistance vessels. The resistance of the arterioles results in marked pressure drops such that, by the time blood reaches the end of most of the systemic arterioles, the blood pressure has dropped to about ______(10) mmHg and is no longer exhibiting marked pulses. Since the pressure at the end of most systemic arterioles is about 30 to 40 mmHg, the pressure at the beginning of most systemic capillaries is about __________ mmHg (11). By the end of most systemic capillaries, the blood pressure has dropped to about ______ (12) mmHg. Further drops in pressure occur in the venules and veins such that "central venous pressure" or the pressure in the great veins of the thorax and the pressure in the right atrium is about 1-3 mmHg. The blood supply to the kidneys is part of the systemic circulation. The renal arteries branch off of the aorta and are "systemic arteries" just like other systemic arteries, and the mean blood pressure in the renal arteries is about _____(13) mmHg. The renal arteries, like other systemic arteries, branch within the kidneys into smaller arteries and ultimately into the afferent arterioles, which provide blood to the glomerular capillaries. The blood pressure at the afferent arteriolar end of the glomerular capillaries is about ____ mmHg (14) (see page 482, Fig. 14-8 , for glomerular capillary pressure), a pressure considerably ____
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This note was uploaded on 06/14/2011 for the course PHYI 202 taught by Professor Shea during the Summer '09 term at UNC.

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10 practice - Lesson 10 Practice Set The Vascular System...

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