Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 46, Problem 13TYU
Test Your Understanding
13. INTEREPT DATA Look at Figure 46-10b. How would strenuous muscle activity affect the oxygen–hemoglobin dissociation curve? (Hint: How does muscular activity affect pH? See Chapter 40 if you need to review this concept.)
Figure 46-10 Oxygen-hemoglobin dissociation curves
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Students have asked these similar questions
What is the biophysical reason that myoglobin (as opposed to hemoglobin) could never play the role of the oxygen transport system in the human body?
1.
It binds oxygen too tightly
2.
It binds oxygen too weakly
3.
It binds oxygen too slowly
4.
It does not bind oxygen cooperatively
3. Explain why the structure of myoglobin makes it function well as an oxygen-storage protein whereas the structure of
hemoglobin makes it function well as an oxygen-transport protein. Discuss this in terms of the binding curve below
and include the role of cooperativity in your answer.
100
80
Percent O₂ saturation
8
60
20
Working
muscle
20
Resting
muscle
Myoglobin
Hemoglobin
Venous
po₂
60
40
80
Partial pressure of oxygen (pO₂, torr)
Arterial po
100
120
4. What is the effect of pH on the binding of oxygen to hemoglobin (the Bohr Effect)? What happens to the percent saturation as a
function of po2 graph as a result of pH change (include graph)? Why is there a pH difference in tissues versus the lungs? Briefly
describe how the Bohr Effect contributes to oxygen transport to the tissues.
5. How does BPG binding to hemoglobin decrease its affinity for oxygen?
equation.
Droduct Property
ess Your Learning
Direction: Write the capital letter of the correct answer.
1. Which of the following statements about the human respiratory system is
NOT TRUE?
A. when we breathe in, air travels from the pharynx to the trachea
B. the bronchioles branch into bronchi
C. Alveolar ducts connect to the alveolar sacs
D. gas exchange between the lungs and the blood takes place in the
alveolus
2. Which of the following statements about the circulatory system is NOT
TRUE?
A. blood in the pulmonary vein is deoxygenated
B. blood in the inferior vena cava is deoxygenated
C. blood in the pulmonary artery is deoxygenated
D blood in the gorto in ouganntod
Chapter 46 Solutions
Biology (MindTap Course List)
Ch. 46.1 - Compare the advantages and disadvantages of air...Ch. 46.1 - What are some advantages of gas exchange in air...Ch. 46.2 - Describe the following adaptations for gas...Ch. 46.2 - Why are specialized respiratory structures...Ch. 46.2 - How does gas exchange differ among the following...Ch. 46.2 - How does the countercurrent exchange system...Ch. 46.3 - Prob. 3LOCh. 46.3 - Prob. 4LOCh. 46.3 - Prob. 5LOCh. 46.3 - Describe the regulation of breathing in humans and...
Ch. 46.3 - What is the sequence of inhaled airflow through...Ch. 46.3 - Prob. 2CCh. 46.3 - Prob. 3CCh. 46.3 - Prob. 4CCh. 46.4 - Prob. 7LOCh. 46.4 - Prob. 1CCh. 46.4 - Prob. 2CCh. 46 - Test Your Understanding 1. Which of the following...Ch. 46 - Prob. 2TYUCh. 46 - Prob. 3TYUCh. 46 - Prob. 4TYUCh. 46 - Test Your Understanding 5. Which sequence most...Ch. 46 - Prob. 6TYUCh. 46 - Test Your Understanding 7. According to Ficks law...Ch. 46 - Prob. 8TYUCh. 46 - Prob. 9TYUCh. 46 - Prob. 10TYUCh. 46 - Test Your Understanding 11. VISUALIZE Draw and...Ch. 46 - Test Your Understanding 12. EVOLUTION LINK What...Ch. 46 - Test Your Understanding 13. INTEREPT DATA Look at...Ch. 46 - Test Your Understanding 14. PREDICT What problems...Ch. 46 - Prob. 15TYUCh. 46 - EVOLUTION LINK Aquatic mammals such as whales and...Ch. 46 - Prob. 17TYU
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- Please explain the difference between the oxygen dissociation curve created by myoglobin (asymptotic) versus the oxygen dissociation curve created by hemoglobin (sigmoidal). Why does this occur? Myoglobin O₂ saturation (%) 100 80 60 40 20 0 20 Hemoglobin 40 60 80 100 120 Po₂ (mmHg)arrow_forwardImagine you are an oxygen molecule. Your job is to get inside the body and deliver oxygen to a working muscle. Create a word flowchart to identify all the structures you will encounter during your passage from the outside air to the inside of a muscle cell. Include a short description of how you will exchange places with carbon dioxide when you arrive at the cell.arrow_forwardA forearm skeletal muscle has a hemoglobin concentration of 92 microM. An arterial occlusion of the upper arm determines a decrease in saturation at a rate of 15% per minute, and no change in blood volume. Find the muscle oxygen consumption in units of micromolo2/(100 mltissue-min).arrow_forward
- 1. Is this statement correct or incorrect? Explain. During strenuous exercise, the oxygen-hemoglobin dissociation curve shifts to the right. This rightward shift reflects an increase in the affinity of hemoglobin for oxygen and favors loading of O2 onto hemoglobin in the lungs. 2. Is this statement correct or incorrect? Explain. Compared to hemoglobin, myoglobin has a lower binding affinity for O2 and a higher O2 binding capacity, two characteristics that allow myoglobin to efficiently provide skeletal muscle cells with a readily-accessible reservoir of O2.arrow_forwardMyoglobin and hemoglobin differ in... Question 30 options: the type of prosthetic group used their total oxygen binding capacity the number of sub-units present A and B B and Carrow_forwardBelow is the oxygen saturation curve for myoglobin and hemoglobin at a pH of 7. The p50 for myoglobin is indicated by the dashed lines on the graph. Mb and Hb O2 saturation: pH 7 10 0.8 Myoglobin 0.6 P50 = 0.2 0.4 Hemoglobin 0.2 - 0.0 pO2 [kPa] Which of these molecules (Mb/Hb/neither or both) has cooperativity? [ Select ] What would you expect to happen to the p50 of myoglobin if the pH were decreased to a pH of 4? [ Select ] Fraction saturationarrow_forward
- Figure 6 shows the binding of oxygen to myoglobin and haemoglobin (Y-axis: Fraction saturation) when they are exposed to various partial pressures of oxygen (X-axis: pO2). 0.9 0.8 Myoglobin 0.7 0.6 0.5 0.4 Hemoglobin 0.3 0.2 0.1 2 10 12 Po, (kPa) Figure 6 (i) Briefly compare the protein structure of myoglobin to that of haemoglobin. (ii) Based on Figure 6, explain the differences between the functions performed by myoglobin and haemoglobin. Fraction saturationarrow_forwardWhat is the typical value of Diffusion Distance in the air and tissue for an Oxygen molecules after 1 sec if N = 1012 in air and N = 1014in tissue? %3D %3Darrow_forwardIn our discussion of oxygen binding, we saw how oxygen affinity may be affected by temperature. The book mentions that "temperature effects may become a problem in the hypothermic limbs of mammals in Arctic climates," (pg. 650) but it doesn't explain why. Given what you understand about oxygen binding affinity and temperature, why would these animals have an issue? O The cold temperatures increase the binding affinity of oxygen to myoglobin. The cold temepratures decrease the binding affinity of oxygen to hemoglobin. The cold temperatures increase the binding affinity of oxygen to hemoglobin. The cold temperatures decrease the bindingg affinity of oxygen to myoglobin.arrow_forward
- Some patients with severe emphysema have constant high levels of carbon dioxide because of inadequate ventilation. The central nervous system breathing center in these patients becomes insensitive to carbon dioxide and more dependent on the level of oxygen, which is low. These patients are said to have “oxygen-dependent respiratory drive". What might happen if you give such a person high levels of supplemental oxygen? Essay Toolbar navigation BIU S > > > !!!arrow_forwardWhich of the following statements does NOT apply to the K value in the equation for the oxygen binding curve of myoglobin? It is numerically equal to p50. O A. It is defined as that oxygen partial pressure at which half of the oxygen binding sites are occupied. В. If Y> K, then myoglobin is less than 50% saturated with oxygen. OC. O D. It is a measure of the affinity of myoglobin for oxygen. OE. It is the value of po2 at which Y = 0.5.arrow_forwardExperiments were performed in an anatomy and physiology laboratory. First, the rate and depth of respiration for a resting student were determined. In experiment A, students ran in place for 30 seconds, immediately sat down and relaxed, and then had their respiration rate and depth measured.Experiment B was conducted in the same manner as experiment A, except that the students held their breath while running in place. What differences in respiration would you expect for the two experiments? Explain the basis for your predictions.arrow_forward
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