Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 36.10, Problem 1TYK
Summary Introduction
Introduction:
The control center of the lungs is present in the central nervous system. It is the collection of nuclei and is known as respiratory centers in mammals.
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When the blood passes through the lungs, CO₂ is expelled and the hemoglobin picks
up oxygen. Place the following steps in the correct order (1 = first thing to happen),
assuming that it is the decreased [CO₂] during exhalation that initiates the
transition.
Carbonic anhydrase works to restore the CO₂/bicarbonate equilibrium,
reducing the [H+]
The T-state is less stabilized.
Oxygen binds to the hemoglobin.
Protons dissociate from the hemoglobin.
When compared to a blood sample from a normally breathing person, a person with pulmonary disease resulting in reduced
alveolar ventilation would show:
Select one:
Oa.
elevated plasma pCO2, increased plasma HCO3 and lower pH
O b
decreased plasma pCO2, decreased plasma HCO3 and lower pH
Oc.
elevated plasma pCO2, increased plasma HCO3 and higher pH
Od.
elevated plasma pCO2, decreased plasma HCO3 and lower pH
elevated plasma pCO2, decreased plasma HCO3 and higher pH
The carbonic acid equilibrium is shown below. Exhalation of CO2 by the lungs causes this equilibrium to shift to the ______, which causes the pH of the blood to _______.
H+ + HCO3- <=> H2CO3 <=> H2O + CO2
a) left; increase
b) left; decrease
c) right; decrease
d) right; increase
Chapter 36 Solutions
Principles of Biology
Ch. 36.1 - Prob. 1CCCh. 36.1 - Prob. 1TYKCh. 36.1 - Prob. 2TYKCh. 36.2 - Prob. 1BCCh. 36.2 - Prob. 1TYKCh. 36.2 - Which is false? Platelets are nucleated cells that...Ch. 36.3 - Prob. 1CCCh. 36.3 - Prob. 2CCCh. 36.3 - Prob. 3CCCh. 36.3 - Prob. 1TYK
Ch. 36.3 - Prob. 2TYKCh. 36.4 - Prob. 1CCCh. 36.4 - Prob. 1TYKCh. 36.4 - Prob. 2CCCh. 36.4 - Prob. 2TYKCh. 36.5 - Prob. 1TYKCh. 36.5 - Prob. 2TYKCh. 36.6 - Prob. 1TYKCh. 36.7 - Prob. 1CCCh. 36.7 - Prob. 1BCCh. 36.7 - Prob. 2CCCh. 36.7 - Prob. 3CCCh. 36.7 - Prob. 1TYKCh. 36.7 - Which of the following statements is false? The...Ch. 36.8 - Prob. 1TYKCh. 36.8 - Prob. 2TYKCh. 36.9 - Prob. 1CCCh. 36.9 - Prob. 1TYKCh. 36.9 - Prob. 2TYKCh. 36.10 - Prob. 1BCCh. 36.10 - Prob. 1TYKCh. 36.11 - Prob. 1TYKCh. 36.11 - Prob. 2TYKCh. 36.11 - Prob. 3TYKCh. 36 - Prob. 1TYCh. 36 - Prob. 2TYCh. 36 - Prob. 3TYCh. 36 - Prob. 4TYCh. 36 - Considering blood flow through a closed...Ch. 36 - Prob. 6TYCh. 36 - Prob. 7TYCh. 36 - Prob. 8TYCh. 36 - Prob. 9TYCh. 36 - Prob. 10TYCh. 36 - Discuss the difference between closed and open...Ch. 36 - Prob. 2CCQCh. 36 - Prob. 3CCQCh. 36 - Prob. 1CBQCh. 36 - List the components of the mammalian respiratory...
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- Explain what a partial pressure gradient is and how such gradients figure in gas exchange.arrow_forward(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?arrow_forwardCalculate the average ml of oxygen molecules in 100 ml blood in the athletes at low altitude and then in athletes in high altitude while training at high altitude. Use the following information: 1.39 ml of oxygen per gram of hemoglobin. Do athletes training at high altitudes have more or less oxygen molecules per ml of blood then athletes training at low altitudes? Explain why this difference gives athletes who train at high altitudes an advantage over athletes who train only at low altitudes.arrow_forward
- If there were little to no Chloride in the blood, what would happen to CO2 transport and why? Select one: O a. CO2 transport would not change because chloride is not part of the carbonic anhydrase reaction O b. CO2 transport would decline because H+ would not be able to bind to hemoglobin O c. CO2 transport would decline because HCO3 wouldn't be able to exit the red blood cell thus inhibiting the carbonic anhydrase reaction O d. CO2 transport would increase because HCO3 would be able to exit the red blood cell more freelyarrow_forwardKeep in mind the chemical reaction: CO2 + H20 H2CO3 H* + HCO3 A patient on a mechanical respirator often suffers from alkalosis because a. excess of oxygen favors reaction to the left side hyperventilation leads to removal of excess of CO2 b. Oc. hyperventilation leads to removal of excess of H* ion along with CO2 as both have increased. Both (b) and (c) are correct. Od.arrow_forward1) Construct a figure that shows how most molecules of CO2 gas is stored in the blood. 2) For each of the steps in your figure above: Describe what is happening in a sentence. 3) Answer the following in a brief sentece: Why does the body store CO2 this way instead of just transporting the gas dissolved in a liquid.arrow_forward
- You have read about the Respiratory system in your Animal Physiology classes and are very excited to share the knowledge with one of your friend in the Chemistry Department. You explain to him the gas exchange between tissues and blood. However, your friend is very confused about the fact that how almost an equal amount of O2 & CO2 is exchanged in normal human (even during exercise) when the diffusion coefficient of CO2 is 20 times that of O2 (as CO2 is much more soluble in body tissues than O2). a) Explain the reason for the same to your friend. b) Why this equilibrium can’t be maintained in people who have a diseased lung with thickened walls?arrow_forwardBoth the H1 and HCO3 2 ion concentrations in the blood are regulated by the three major systems. What are they?arrow_forwardIndividuals with cystic fibrosis produce thick mucus in the lungs, resulting in a higher-than-normal level of CO2 in the blood. What is the problem that results from higher-than-normal levels of COz in the blood? Please relate this to buffers in the blood and construct a clear problem statement.arrow_forward
- What happens to pCO2 levels as the disease (Idiopathic pulmonary fibrosis) progresses, and what would the teeter totter look like in this situation?CO2+ H2O ⇌ H2CO3 ⇌ H++ HCO3−arrow_forwardThe transportation of carbon dioxide involves a reversible reaction involving the bicarbonate ion. If this reaction was not readily reversible, then carbon dioxide would would drop, as high carbon dioxide levels cause hyperventilation build up in the tissues and become toxic would remain at a constant level, as red blood cells are frequently replaced be released in the lungs when the concentration gradient become largearrow_forwardWhen travelling high altitude, one of the problem is alkalosis of the blood. Remember the equation for acid balance: CO2 + H2O ⇌ H2CO3 ⇌ HCO3− + H+ If there is a low amount of CO2 outside, then greater CO2 than normal will diffuse out of the lungs. This will cause the blood to become more basic. To counteract the problem, a drug may be taken to both lower the blood pressure and help correct the pH. To do this, it blocks a symporter of HCO3- and Na+ in the proximal tubule of the kidney. Q: How would blocking transport of HCO3- help to lower the pH of the blood?arrow_forward
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