Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Question
Chapter 24.3, Problem 2SC
To determine
The primary structures that can pump blood inside the body.
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2. Suppose that a person afflicted with COVID-19 has an enlarged portion of artery with a cross-sectional area 40% bigger than the normal. What is the speed of the blood through this enlarged artery?
A major artery with a cross-sectional area of 0.95 cm2 branches into 18 smaller arteries, each with an average cross-sectional area of 0.39 cm2.
By what factor is the average speed of the blood reduced when it passes into these branches?
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Suppose that the aorta has a radius of about 1.25 cm and that the typical blood velocity is around 30 cm/s and that it has an average density of 1050 kg/m^3. What is the average blood velocity in the major arteries if the total cross-sectional area of the major arteries is 20 cm^2?
a.
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v=0.83 m/s
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v=0.074 m/s
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v=0.03 m/s
Chapter 24 Solutions
Integrated Science
Ch. 24.3 - Prob. 1SCCh. 24.3 - Prob. 2SCCh. 24.3 - Prob. 3SCCh. 24.3 - Prob. 4SCCh. 24.3 - Prob. 5SCCh. 24.5 - Prob. 6SCCh. 24.5 - Prob. 7SCCh. 24.7 - Prob. 8SCCh. 24.7 - Prob. 9SCCh. 24.8 - Prob. 10SC
Ch. 24.9 - Prob. 11SCCh. 24.9 - Prob. 12SCCh. 24.9 - Prob. 13SCCh. 24.9 - Prob. 14SCCh. 24.10 - Prob. 15SCCh. 24 - Prob. 1CQCh. 24 - Prob. 2CQCh. 24 - Prob. 3CQCh. 24 - Prob. 4CQCh. 24 - Prob. 5CQCh. 24 - Prob. 6CQCh. 24 - List the differences between the central and...Ch. 24 - Describe how a nerve impulse travels along a nerve...Ch. 24 - Prob. 9CQCh. 24 - Prob. 10CQCh. 24 - Prob. 11CQCh. 24 - Prob. 12CQCh. 24 - Prob. 13CQCh. 24 - Prob. 14CQCh. 24 - Prob. 15CQCh. 24 - Prob. 16CQCh. 24 - Prob. 17CQCh. 24 - Prob. 18CQCh. 24 - Prob. 19CQCh. 24 - Prob. 20CQCh. 24 - Prob. 1PEACh. 24 - Prob. 2PEACh. 24 - A serving of cookies contains 120 calories and 8...Ch. 24 - Prob. 4PEACh. 24 - Prob. 1PEBCh. 24 - Prob. 2PEBCh. 24 - Prob. 3PEBCh. 24 - Prob. 4PEB
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- (a) As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). If the blood speed increases by a factor of 4.00 and the total cross-sectional area of the venules is 10.0 cm2, what is the total cross-sectional area of the capillaries feeding these venules? (b) How many capillaries are involved if their average diameter is 10.0 m?arrow_forward9. The blood speed in a normal segment of a horizontal artery is 0.12 m/s. An abnormal segment of the artery is narrowed by an arteriosclerotic plaque down to one-third its normal cross-sectional area. What is the difference in blood pressures between the normal and constricted segments of the artery? (The density of the blood is 1060 kg/m3) Paarrow_forward12- The blood vessels are the pipes of the body. true O falsearrow_forward
- The arterioles (small arteries) leading to an organ, constrict in order to decrease flow to the organ. To shut down an organ, blood flow is reduced naturally to 1.00% of its original value. By what factor did the radii of the arterioles constrict? Penguins do this when they stand on ice to reduce the blood flow to their feet.arrow_forwardIf you are infusing a 1 L Iv bag of a normal saline at a rate of 100 ml per hour, how long will it take for the entire IV bag to infuse into the patient ?arrow_forwardCapillaries Explain the direction and the rate of flow in the capillaries. Does the rate remain constant or does it fluctuate from time to time? Does the direction of blood flow ever change? What limits a capillary from being smaller than a certain size? Are any capillaries dead-end sacs? Are all cells directly adjacent to a capillary, thus providing a simple passage for food, dissolved gasses, and wastes?arrow_forward
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- Meme Questions: 1. Normal blood flow through the internal carotid artery is 400 mL/min. If this vessel's radius is reduced by 50% of its normal radius and the pressure does not change, what is the new blood flow?BF= PP 400 mL/m R 200 ml/m : 000arrow_forwardThe main artery whose cross-sectional area (lem) branches into 5 smaller arteries, each of these arteries has an average cross-sectional area of (0.4 cm), by what factor will the rate of blood flow decrease as it passes through those branches? arterial 0.75 0.33 0.25 0.5arrow_forwardThe primary organs of the respiratory system are the _____, which carry out this ecchange of gases as you breathe. Inhaling moves the diaphragm______and expands the _______.When you _______ the diaphragm relaxes. The diaphragm and ribs return to their original place.arrow_forward
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