Human Anatomy & Physiology (2nd Edition)
2nd Edition
ISBN: 9780134553511
Author: Erin C. Amerman
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 1AYKA
When a person hyperventilates, what happens to his or her blood pH? A person who is hyperventilating is often told to breathe into a paper bag. Why might this help to correct the pH imbalance?
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When a person hyperventilates, what happens to his or her blood pH? A person who is hyperventilating is often told to breathe into a paper bag. Why might this help to correct the pH imbalance?
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
Which of the following statements regarding the role of the respiratory system in the acid-base status of the body is NOT TRUE?
A. Non-volatile acids are excreted by ventilation
B. Volatile acids are excreted by ventilation.
OC. Hyperventilation can result in a respiratory alkalosis.
D. Hypoventilation can result in a respiratory acidosis
OE. Ventilation adjusts the PCO2-bicarbonate buffer system.
Chapter 21 Solutions
Human Anatomy & Physiology (2nd Edition)
Ch. 21.1 - What are the main structures of the respiratory...Ch. 21.1 - 2. Is the larynx part of the upper or lower...Ch. 21.1 - Where are alveoli? What is their basic function?Ch. 21.1 - 4. List and define the four processes that make...Ch. 21.1 - 5. How does the respiratory system contribute to...Ch. 21.1 - List and describe four functions of the...Ch. 21.2 - Match the following terms with the correct...Ch. 21.2 - 2. Describe the external and internal structure...Ch. 21.2 - What happens to the glottis and the pitch of the...Ch. 21.2 - 4. What is the function of the tracheal mucosa?
Ch. 21.2 - How does the epithelium of the bronchial tree...Ch. 21.2 - Trace the pathway from the primary bronchi to the...Ch. 21.2 - 7. What structures make up the respiratory...Ch. 21.2 - Explain the structure of the pleural cavities.Ch. 21.3 - What drives the movement of gases?Ch. 21.3 - Prob. 2QCCh. 21.3 - 3. What drives the movement of gases during...Ch. 21.3 - What does the intrapleural pressure prevent under...Ch. 21.3 - 5. How are inspiration and expiration achieved?
Ch. 21.3 - 6. What is airway resistance? What is the main...Ch. 21.3 - How does surfactant decrease surface tension?Ch. 21.3 - 8. What is pulmonary compliance? What three...Ch. 21.3 - 9. What are three measurable pulmonary volumes?
Ch. 21.3 - 10. What is the vital capacity?
Ch. 21.4 - 1. How does the pressure gradient between two gas...Ch. 21.4 - Prob. 2QCCh. 21.4 - 3. What takes place during pulmonary gas...Ch. 21.4 - Prob. 4QCCh. 21.4 - Prob. 5QCCh. 21.4 - What are three factors that influence the...Ch. 21.5 - How is the majority of oxygen transported through...Ch. 21.5 - How do temperature, pH, PCO2, and BPG affect Hbs...Ch. 21.5 - 3. Why is the S shape of the oxygen-hemoglobin...Ch. 21.5 - What are the three ways in which the body...Ch. 21.5 - Prob. 5QCCh. 21.5 - Prob. 6QCCh. 21.6 - 1. Which steps of respiration rely on partial...Ch. 21.7 - 1. Which collection of neurons generates the...Ch. 21.7 - What are the functions of the dorsal and ventral...Ch. 21.7 - 3. Where are the central chemoreceptors located?...Ch. 21.7 - What do the central chemoreceptors trigger if...Ch. 21.7 - Prob. 5QCCh. 21.8 - 1. What are the differences between obstructive...Ch. 21.8 - 2. What are the three subtypes of COPD? What is...Ch. 21.8 - Prob. 3QCCh. 21 - Which of the following are functions of the...Ch. 21 - Prob. 2CYRCh. 21 - 3. Mark the following statements as true or false....Ch. 21 - Prob. 4CYRCh. 21 - 5. Fill in the blanks: The structures that vibrate...Ch. 21 - Prob. 6CYRCh. 21 - Prob. 7CYRCh. 21 - Prob. 8CYRCh. 21 - Match each term with the correct definition....Ch. 21 - Prob. 10CYRCh. 21 - Which of the following does not affect the...Ch. 21 - Prob. 12CYRCh. 21 - Fill in the blanks: When the alveolar PO2...Ch. 21 - Prob. 14CYRCh. 21 - Match the following terms with the correct...Ch. 21 - 16. Fill in the blanks: Hyperventilation causes...Ch. 21 - The basic rhythm for breathing is maintained by...Ch. 21 - Prob. 18CYRCh. 21 - Prob. 19CYRCh. 21 - Prob. 20CYRCh. 21 - Prob. 1CYUCh. 21 - Prob. 2CYUCh. 21 - Prob. 3CYUCh. 21 - Prob. 4CYUCh. 21 - 1. When a person hyperventilates, what happens to...Ch. 21 - Prob. 2AYKACh. 21 - Prob. 3AYKACh. 21 - Prob. 4AYKACh. 21 - 5. Mrs. Jordan is brought to the emergency room by...Ch. 21 - What happens to the metabolic rate of skeletal...
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- Explain what a partial pressure gradient is and how such gradients figure in gas exchange.arrow_forwardFigure 39.20 The kidneys are responsible for removing excess H+ ions from the blood. If the kidneys fail, what would happen to blood pH and to hemoglobin affinity for oxygen?arrow_forwardWhen 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.arrow_forward
- 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 pHarrow_forwardDivers sometimes hyperventilate before swimming underwater for an extended period of time. However, this could cause a sudden blackout while they are under the surface and lead to potential drowning. What caused the blackout to occur?arrow_forwardA patient has severe uncompensated respiratory acidosis. Temperature is normal and hemoglobin concentration is within the reference range. Which of the following oxygen dissociation curves best describes the relationship between oxygen content and PO2 (the solid curve is normal) in this patient?arrow_forward
- Under stressful conditions, some people hyperventilate. What effect doesthe rapid rate of ventilation have on blood pH? Explain why breathing intoa paper bag helps a hyperventilating person.arrow_forwardAn injured soccer player arrives by ambulance in the emergency room. She is in obvious distress, breathing rapidly. Her blood PCO2 is 26 mm Hg and pH is 7.5. Is she suffering from hyperventilation or hyperpnea? Explain.arrow_forwardA patient is hyperventilating. The "blowing off" of excessive carbon dioxide causes a decrease in blood H+ concentration. How can the carbonic acid buffering system function to correct this imbalance? CO2 + H2O → H2CO3 → H* + HCO3 O H2CO3 dissociates to form more H+ and raise pH. O HCO3- binds with H+ to form H2CO3 and raise pH. O H2CO3 dissociates to form more H+ and lower pH. O HCO3- binds with H+ to form H2CO3 and lower pH. O none of the abovearrow_forward
- Individuals 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_forwardIn a person who suffers acidosis, the way to counteract the condition is by: Drink a large amont of water Slow Breathing Inhale a greater amount of CO2 than normal Stop breathing Fast and deep breathingarrow_forwardCarbonic anhydrase converts: 00 CO2 + H20 to Bicarbonate and H+ Bicarbonate and H+ to CO2 + H20 carbon dioxide to H20 bicarbonate to hydrogen ion Both A and Barrow_forward
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