BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 27, Problem 6MCQ
Summary Introduction
Introduction:
The movement of air in and out of the body is known as the respiratory cycle. The inhaled air contains mainly oxygen gas (21%) along with a little amount of carbon dioxide. Carbon dioxide is produced as the by-product of respiration process that occurs in the body. The amount of carbon dioxide exhaled will be more than inhaled.
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(a) The partial pressure of CO2 in the lungs can be varied rapidly by the rate and depth of breathing. For example, a common remedy to alleviate hiccups is to increase the concentration of CO2 in the lungs. This can be achieved by holding one’s breath, by very slow and shallow breathing (hypoventilation), or by breathing in and out of a paper bag.Under such conditions, pCO2 in the air space of the lungs rises above normal. Qualitatively explain the effect of these procedures on the blood pH.(b) A common practice of competitive short-distance runners is to breathe rapidly and deeply (hyperventilate) for about half a minute to remove CO2from their lungs just before the race begins. Blood pH may rise to 7.60. Explain why the blood pH increases.(c) During a short-distance run, the muscles produce a large amount of lactic acid (CH2CH(OH)COOH; K2 = 1.38 × 10 –4 M) from their glucose stores. Why might hyperventilation before a dash be useful?
The time it takes for blood to pass through the capillaries of a pulmonary alveolus typically is less than 0.3 seconds. During this time, what will occur?
Select one:
a.
The blood plasma will be cleansed of its entire CO2 content and will be saturated with O2.
b.
An enzyme will catalyze the conversion of oxyhemoglobin to carboaminohemoglobin.
c.
Blood will pick up CO2 and O2 will be released to the alveolus.
d.
Blood will pick up O2 and CO2 will be released to the alveolus.I think this is C or D tell me the answer and why
The trachea has rings of cartilage to:
a. Allow the trachea to close when air is not present
b. Keep the trachea open for continuous air flow
c. Allow the trachea to close when food is not present
d. Keep the trachea open for continuous food flow
Chapter 27 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 27.1 - What are the components of blood?Ch. 27.1 - Prob. 2MCCh. 27.1 - Prob. 3MCCh. 27.1 - Prob. 4MCCh. 27.3 - What is the cardiovascular system?Ch. 27.3 - Prob. 2MCCh. 27.4 - Prob. 1MCCh. 27.4 - Prob. 2MCCh. 27.4 - Prob. 3MCCh. 27.4 - How does exercise affect the circulatory system?
Ch. 27.5 - Prob. 1MCCh. 27.5 - Prob. 2MCCh. 27.5 - Prob. 3MCCh. 27.6 - Prob. 1MCCh. 27.6 - Prob. 2MCCh. 27.6 - Prob. 3MCCh. 27.6 - Prob. 4MCCh. 27.7 - Prob. 1MCCh. 27.7 - Describe the events of one respiratory cycle.Ch. 27.7 - Prob. 3MCCh. 27.8 - Prob. 1MCCh. 27.8 - Prob. 2MCCh. 27.8 - Prob. 3MCCh. 27 - Prob. 1MCQCh. 27 - Prob. 2MCQCh. 27 - Prob. 3MCQCh. 27 - Prob. 4MCQCh. 27 - Prob. 5MCQCh. 27 - Prob. 6MCQCh. 27 - Prob. 7MCQCh. 27 - Prob. 1WIOCh. 27 - Prob. 2WIOCh. 27 - Prob. 3WIOCh. 27 - Describe the events that occur during one cardiac...Ch. 27 - Prob. 5WIOCh. 27 - Prob. 6WIOCh. 27 - Explain how a sphygmomanometer blood pressure...Ch. 27 - Prob. 8WIOCh. 27 - Prob. 9WIOCh. 27 - Prob. 10WIOCh. 27 - Prob. 11WIOCh. 27 - Prob. 12WIOCh. 27 - Prob. 13WIOCh. 27 - Prob. 14WIOCh. 27 - Use the Internet to learn more about disorders of...Ch. 27 - Prob. 2SLCh. 27 - Review the Survey the Landscape figure in the...Ch. 27 - How do the pulmonary and systemic circulatory...Ch. 27 - Prob. 3PITCh. 27 - Prob. 4PIT
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