Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 10, Problem 14TY
Summary Introduction
Introduction:
Partial pressure refers to the amount of pressure that is exerted by a particular gas present in the mixture in case it occupies the same volume on its own. It is basically the hypothetical pressure of that particular gas. In lungs, the partial pressure of the O2 (oxygen) is about 100 mm Hg.
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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
Which one of the following statements about the afferent components of the respiratory control system is INCORRECT?
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In order to stimulate hyperventilation the sympathetic nervous system tricks the carotid body by constricting the capillaries that serve glomus cells; reduced blood flow to the cell causes localised hypoxia triggering a compensatory hyperventilation response even before systemic hypoxia is apparent.
b.
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c.
Chemoreceptor cells can be found in the carotid body.
d.
The glossopharyngeal nerve transmits afferent impulses from the carotid body to the ventral respiratory group of neurons.
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Chapter 10 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 10 - Do you think e-cigarettes should be regulated, and...Ch. 10 - What safety concerns do you have, if any, about...Ch. 10 - List at least three functions of your nose.Ch. 10 - Prob. 2CRCh. 10 - Prob. 3CRCh. 10 - Prob. 4CRCh. 10 -
5. Explain what happens to gas pressure in a...Ch. 10 - Prob. 6CRCh. 10 - Prob. 7CRCh. 10 - Prob. 8CR
Ch. 10 - Prob. 9CRCh. 10 - Prob. 10CRCh. 10 - Which of the following lists the order of...Ch. 10 - Prob. 2TYCh. 10 - Much of the respiratory tract is lined with...Ch. 10 - Prob. 4TYCh. 10 - Prob. 5TYCh. 10 - Prob. 6TYCh. 10 - Prob. 7TYCh. 10 -
8. During a breathing cycle, as the diaphragm and...Ch. 10 - Prob. 9TYCh. 10 - Prob. 10TYCh. 10 - Prob. 11TYCh. 10 - Prob. 12TYCh. 10 - Prob. 13TYCh. 10 - Prob. 14TYCh. 10 - Prob. 15TYCh. 10 - Why would someone administering a Breathalyzer...Ch. 10 -
2. At a murder trial, a pathologist is asked...Ch. 10 - Prob. 3AWKCh. 10 - Prob. 4AWKCh. 10 - Prob. 5AWKCh. 10 - Prob. 6AWKCh. 10 - Prob. 7AWK
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- O2 bound to hemoglobin: a. acts the same as physically dissolved oxygen b. Comes off the hemoglobin (dissociates) more easily as you increase the oxygen partial pressure c. exerts a partial pressure d. Comes off the hemoglobin (dissociates) more easily as you increase the acidity (decrease the pH) e. all the options are correct 2. Air convection in mammals is driven by a smaller pressure gradient than blood convection because: a. Bronchioles have a greater resistance to flow than arterioles b. bronchioles tend to have a smaller radius than arterioles and capillaries c. air is easier to move with pressure gradients than blood d. air generally travels farther in your body than does blood e. air is heavier than blood 3. The rate of diffusion of gases is NOT determined by which of the following? a. The area of the surface across which diffusion is occurring b. The mechanical energy…arrow_forwardWhich of the following are true? A. Peripheral Chemo receptors for O2 in H+ ions are found in the carotid and aortic bodies. B. Peripheral chemoreceptors for O2 and H+ ions are found only in the carotid body. C. Peripheral chemoreceptors for O2 and H+ ions are found only in the aortic body. D. O2 and CO2 are monitored in the medulla Choose the correct answerarrow_forwardWhich of the following is incorrect? a. Hemoglobin transports oxygen through the blood from the lungs to the tissues Ob. None; all the other choices are correct c. Hemoglobin transports H+ through the blood from the tissues to the lungs O d. Lower pH increases hemoglobin's O₂-binding affinityarrow_forward
- Which of these three paracrine chemicals causevasodilation?a. ATPb. adenosinec. nitric oxidearrow_forwardAs lung compliance decreases, the plasma HCO3 in cells moving from the lungs to the heart will: a. increase b. decrease c. stay the samearrow_forwardWhich of the following situations occurs if a person's blood becomes more alkaline? A. Hemoglobin molecules retain less oxygen per heme group under alkaline conditions than they do at neutral pH or under acidic conditions. B. Hemoglobin molecules give up oxygen more readily under alkaline conditions than they do under neutral pH or under acidic conditions. C. Hemoglobin molecules change shape and begin to lose oxygen molecules. D. Hemoglobin molecules retain oxygen more readily under alkaline conditions than they do at neutral pH or under acidic conditions. E. There is no change in hemoglobin's oxygen-binding affinity under alkaline conditions when compared to blood at neutral pH or under acidic conditions.arrow_forward
- If the blood lacked red blood cells but the lungs were functioning normally, A. The arterial PO2 would be normal. B. The oxygen content of arterial blood would be normal. C. Both A and B would apply. D. Neither A nor B would apply Which of the following would be most affected by a decrease in the affinity of hemoglobin for oxygen? A. Arterial PO2 B. Arterial percent oxyhemoglobin saturation C. Venous oxyhemoglobin saturation D. Arterial PCO2arrow_forwardWhich of the following sentences is NOT true? A. Decreased blood oxygen levels triggers erythropoietin release B. Leptin decreases sensation of hunger C. Angiotensin II can cause vasoconstriction D. Albumin is the most abundant plasma protein E. Glucose is transported in blood dissolved in plasma F. Norepinephrine, epinephrine, and dopamine are secreted by islet of Langerhansarrow_forwardWhich of these is a true statement?a. In lung capillaries, carbon dioxide combines with water toproduce carbonic acid.b. In tissue capillaries, carbonic acid breaks down to carbondioxide and water.c. In lung capillaries, carbonic acid breaks down to carbondioxide and water.d. In tissue capillaries, carbonic acid combines with hydrogenions to form the carbonate ion.e. All of these statements are true.arrow_forward
- Which of the following occurs during the chlorideshift? a. Chloride is removed from the erythrocyte.b. Chloride is exchanged for bicarbonate.c. Bicarbonate is removed from the erythrocyte.d. Bicarbonate is removed from the blood.arrow_forwardWhich of the following statements is (are) true concerning the pathways for blood clotting?a. The intrinsic pathway takes less time than the extrinsic pathway.b. The intrinsic and extrinsic pathways require sodium.c. The intrinsic pathway is started by factors from damaged tissues.d. The intrinsic pathway requires the same clotting factors as the extrinsic pathway.e. The common pathway results in fibrin changing to fibrinogenarrow_forwardIf the partial pressure of O2 in the plasma islow, how will that affect the movement of O2? ● A. O2 will unload from hemoglobin. ● B. O2 will be converted to HbO2. ● C. O2 will load onto hemoglobin. ● D. O2 will stay bound to hemoglobin and only leave if the red blood cell islocated in a capillary.arrow_forward
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