Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 5MC
Which of the following determines the direction of gas movement? (a) solubility in water, (b) partial pressure gradient, (c) temperature, (d) molecular weight and size of the gas molecule.
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Select the best answer or answers from the choices given: Which of the following determines the direction of gas movement? (a) solubility in water, (b) partial pressure gradient, (c) temperature, (d) molecular weight and size of the gas molecule.
In order for lungs to expand when the thoracic cavity expands, which of these pressures should be LOWEST (measured in mm Hg)?
a) P atm
b) P alv
c) P ip
Which of the following is the volume of air inspired at rest?
A) Total volume
B) Functional residual volume
C) Tidal volume
Chapter 21 Solutions
Anatomy & Physiology (6th Edition)
Ch. 21.1 - Prob. 1CYUCh. 21.1 - Which part of the pharynx houses the pharyngeal...Ch. 21.2 - Which structure seals the larynx when we swallow?Ch. 21.2 - Which structural features of the trachea allow it...Ch. 21.2 - What features of the alveoli and their respiratory...Ch. 21.2 - A 3-year-old boy is brought to the emergency...Ch. 21.3 - The lungs are perfused by two different...Ch. 21.3 - Prob. 8CYUCh. 21.4 - What is the driving force for pulmonary...Ch. 21.4 - What causes the intrapulmonary pressure to...
Ch. 21.4 - What causes the partial vacuum (negative pressure)...Ch. 21.4 - Premature infants often lack adequate surfactant....Ch. 21.5 - Explain why slow, deep breaths ventilate the...Ch. 21.5 - Prob. 14CYUCh. 21.6 - You are given a sealed container of water and air....Ch. 21.6 - PO2 in the alveoli is about 56 mm Hg lower than in...Ch. 21.6 - Suppose a patient is receiving oxygen by mask. Are...Ch. 21.7 - Prob. 18CYUCh. 21.7 - What is the relationship between CO2 and pH in the...Ch. 21.7 - The dotted lines in the two graphs below represent...Ch. 21.8 - Which brain stem respiratory area is thought to...Ch. 21.8 - Prob. 22CYUCh. 21.9 - An injured soccer player arrives by ambulance in...Ch. 21.9 - Prob. 24CYUCh. 21.10 - What distinguishes the obstruction in asthma from...Ch. 21 - Cutting the phrenic nerves will result in (a) air...Ch. 21 - Which of the following laryngeal cartilages is/are...Ch. 21 - Prob. 3MCCh. 21 - The detergent-like substance that keeps the...Ch. 21 - Which of the following determines the direction of...Ch. 21 - When the inspiratory muscles contract, (a) the...Ch. 21 - The nutrient blood supply of the lungs is provided...Ch. 21 - Oxygen and carbon dioxide are exchanged in the...Ch. 21 - Which of the following would not normally be...Ch. 21 - Most oxygen carried in the blood is (a) in...Ch. 21 - Which of the following has the greatest...Ch. 21 - In mouth-to-mouth artificial respiration, the...Ch. 21 - Prob. 13MCCh. 21 - Prob. 14MCCh. 21 - Damage to which of the following would most likely...Ch. 21 - Prob. 16MCCh. 21 - Trace the route of air from the nares to an...Ch. 21 - (a) Why is it important that the trachea is...Ch. 21 - Briefly explain the anatomical reason why most men...Ch. 21 - The lungs are mostly passageways and elastic...Ch. 21 - Describe the functional relationships between...Ch. 21 - Discuss how airway resistance, lung compliance,...Ch. 21 - (a) Differentiate clearly between minute...Ch. 21 - Prob. 24SAQCh. 21 - (a) Define hyperventilation. (b) If you...Ch. 21 - Prob. 1CCSCh. 21 - Prob. 2CCSCh. 21 - Barbara Joley was in the bus that was hit...Ch. 21 - Barbara Joley was in the bus that was hit...Ch. 21 - Prob. 5CCSCh. 21 - Prob. 6CCSCh. 21 - Prob. 7CCS
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- What are some advantages of gas exchange in air over gas exchange in water?arrow_forwardGas moves from an area of ________ partial pressure to an area of ________ partial pressure. low; high low; low high; high high; lowarrow_forwardWhich of the following factors would NOT increase the rate of diffusion of oxygen through the respiratory membrane? A) Increasing the SA/V ratio B) Increasing the partial pressures C) Decreasing the surface area D) Decreasing the thickness of the membrane E) Decreasing the distance the gas has to diffusearrow_forward
- The major nonelastic source of resistance (opposition ) to air flow in the respiratory passageways is______ a) surfactant b ) surface tension d) partial pressure e) frictionarrow_forwardMatch the following statements about ventilation and respiration with whether it is true or false A)intrapulmonary pressure must be higher than atmospheric pressure in order to inhale B)as the volume of a vessel increases, the pressure decreases C)the presence of a thin layer of fluid between the parietal and visceral pleura allows us to increase the size of our lungs D)exhaling is an active process requiring muscle contraction E)elastic recoil decreases the volume of the lungsarrow_forwardThe partial pressure of a gas is dependent upon what two factors?arrow_forward
- What is the partial pressure of gas "H" occupying 20% of humidified air with a total pressure of 847 mmHg? OA) 160 mmHg OB) 147 mmHg O C) 190 mm Hg O D) 169 mm Hg O E) 1690 mm Hgarrow_forwardWhen comparing the amount of oxygen gas to the amount of other gasses in air or our bodies, we use the term.. 1.) Partial pressure 2.) Gas pressure 3.) Oxygen gradient 4.) Oxygen availability 5.) Gas concentrationarrow_forwardWhere in the body is the partial pressure of carbon dioxide the highest? Select one: a) Alveolar air b) Systemic venous blood c) Tissue fluids d) Tissue cells e) Pulmonary venous bloodarrow_forward
- Between inspiration and expiration, which pressure would be equal to P atm? a) P tp b) P alv c) PO2 d) P iparrow_forwardWhich of the following is a normal characteristic of the respiratory membrane? A) The thickness of the respiratory membrane is not important in the efficiency of gas exchange. B) 0.5 to 1 micrometer thick c) at least 3 micrometer thickarrow_forwardDuring normal tidal volume breathing, we expend work/energy during A)expiration only B)inspiration only C)during both inspiration and expiration D)we never expend work/energy during tidal volume breathing The forced vital capacity is influenced by all of the following EXCEPT A)lung size B)airway resistance C)elastic properties of the lung D)abdominal muscles E)the partial pressure of oxygen in mm Hg.arrow_forward
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