Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 48.9, Problem 1CC
Summary Introduction
To determine: The possible effects that are produced to the position of the middle curve, when bicarbonate ions (HCO3-) are added into the blood of resting, healthy individual.
Introduction: The process of circulation inside the body of an organism is responsible for the transportation of oxygen and various nutrients. The purpose of circulation is to fulfil the demands of the tissues and organs and maintains the internal environment of the body. The blood is the responsible carrier that transports various types of
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After spending a day or more at high altitude (with an oxygen partial pressure of 75 torr), the concentration of 2,3- bisphosphoglycerate (2,3-BPG) in red blood cells increases. What effect would an increased concentration of 2,3-BPG have on the oxygen-binding curve for hemoglobin? Why would this adaptation be beneficial for functioning well at high altitude?
Referring to the loading and unloading of oxygen from hemoglobin (as illustrated in the figure), which of the following statements is correct?
Oxygen Dissociation Curve.png
Group of answer choices
When a person in ventilating at rest, 75% of hemoglobin is still oxyhemoglobin
The percent saturation of hemoglobin is higher at higher partial pressures of oxygen
A decrease in the pH of the blood would promote unloading oxygen from the hemoglobin
All of these are correct
How does the concept of partial pressure explain the diffusion of oxygen into our blood stream? Why does this become more difficult at high altitudes?
Chapter 48 Solutions
Biology
Ch. 48.1 - Prob. 1CCCh. 48.1 - Prob. 1CSCh. 48.2 - Core Skill: Connections Leukocytes are part of the...Ch. 48.3 - Prob. 1CCCh. 48.3 - Prob. 2CCCh. 48.4 - Do erythrocytes enter and exit through pores in...Ch. 48.7 - Prob. 1CSCh. 48.7 - Prob. 1CCCh. 48.7 - Prob. 2CCCh. 48.8 - Prob. 1EQ
Ch. 48.8 - Prob. 2EQCh. 48.8 - Prob. 3EQCh. 48.9 - Prob. 1CCCh. 48.10 - Prob. 1CSCh. 48 - Prob. 1TYCh. 48 - Prob. 2TYCh. 48 - A major advantage of a double circulation is that...Ch. 48 - Prob. 4TYCh. 48 - For blood flow through a closed circulation, which...Ch. 48 - Prob. 6TYCh. 48 - The countercurrent exchange mechanism in fish...Ch. 48 - The tracheal system of insects a. consists of...Ch. 48 - Prob. 9TYCh. 48 - Prob. 10TYCh. 48 - Prob. 1CQCh. 48 - Prob. 2CQCh. 48 - Prob. 3CQCh. 48 - Prob. 1COQCh. 48 - List the components of the mammalian respiratory...
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- How does hemoglobin help maintain the oxygen partial pressure gradient during gas transport in the body?arrow_forwardExplain what a partial pressure gradient is and how such gradients figure in gas exchange.arrow_forwardWhat are some advantages of gas exchange in air over gas exchange in water?arrow_forward
- Which of the following statements is FALSE regarding a leftward shift in the hemoglobin-oxygen dissociation curve? A) Affinity for oxygen is increased. B) Oxygen loading onto the hemoglobin is increased. C) Hemoglobin is more saturated at a given PO2. D) It can be caused by a decrease in temperature. E) It can be caused by a decrease in blood pH.arrow_forwardSuppose you visit the Dalai Lama in Dharamsala, India (elevation 1460 m), and you begin to ponder the “big questions,” such as “What is the fractional saturation of the Dalai Lama’s hemoglobin?” a) Assuming the Dalai Lama’s hemoglobin has a Hill coefficient = 3.2, and a P50 = 31 mmHg, calculate the change in fractional O2 saturation of his hemoglobin going from his lungs (where PO2 = 85 mmHg) to his capillaries (where PO2 = 25 mmHg). b) Why do you suppose the Dalai Lama’s hemoglobin has a P50 higher than normal (where “normal” = 27 mmHg)?arrow_forwardWhy is it advantageous for the oxygen-hemoglobindissociation curve to shift to the left in the lungs and to theright in tissues?arrow_forward
- When oxygenated blood (Hemoglobin nearly 100% saturated), reaches resting systemic tissues, what percentage of the available oxygen is unloaded from hemoglobin? 100%, 75%, 50%, or 25%?arrow_forwardIn addition to O2 binding, changes in other chemical conditions can result in changes in hemoglobin structure and function. Increases in blood H+ result in oxygen binding curves for hemoglobin that are shifted to the right. The effect of H+ can be understood in terms of the equilibrium:H-Hb+ + O2 → Hb-O2 + H+How does the difference in pH in the lungs and tissues help hemoglobin do its job of delivering oxygen? Use the equilibrium equation in your argument.arrow_forwardThe ability of hemoglobin to bind oxygen decreases with decreasing oxygen concentration and also decreases with increasing carbon dioxide concentration. What effect do these phenomena have on the delivery of oxygen to tissues?arrow_forward
- In a resting person, how many O2 molecules are attached to each hemoglobin molecule, on average, in blood in the pulmonary arteries? In blood in the pulmonary veins?arrow_forwardWhich of the following is the concentration of hemoglobin-bound oxygen in the blood when the heme is fully saturated? 8500 uM 8630 uM 2200 uM 8800 uMarrow_forwardWrite the reversible equation that shows the reaction of hemoglobin (Hb) with: A. Oxygen B. Carbon dioxidearrow_forward
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