EBK ANATOMY & PHYSIOLOGY
5th Edition
ISBN: 9780321888013
Author: Hoehn
Publisher: VST
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Textbook Question
Chapter 21, Problem 20RQ
The lungs are mostly passageways and elastic tissue. (a) What is the role of the elastic tissue? (b) Of the passageways?
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The lungs are mostly passageways and elastic tissue. (a) What is the role of the elastic tissue? (b) Of the passageways?
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When individuals are hyperventilating, they are told to breathe into a paper bag or into their cupped hands. (a) Explain why this increases blood carbon dioxide levels. (b) What will this do to the breathing rate?
Chapter 21 Solutions
EBK ANATOMY & PHYSIOLOGY
Ch. 21 - Prob. 1CYUCh. 21 - Which structure seals the larynx when we swallow?Ch. 21 - Which structural features of the trachea allow it...Ch. 21 - What features of the alveoli and their respiratory...Ch. 21 - A 3-year-old boy is brought to the emergency...Ch. 21 - The lungs are perfused by two different...Ch. 21 - What is the driving force for pulmonary...Ch. 21 - What causes the intrapulmonary pressure to...Ch. 21 - What causes the partial vacuum (negative pressure)...Ch. 21 - Prob. 10CYU
Ch. 21 - Premature infants often lack adequate surfactant....Ch. 21 - Explain why slow, deep breaths ventilate the...Ch. 21 - You are given a sealed container of water and air....Ch. 21 - PO2 in the alveoli is about 56 mm Hg lower than in...Ch. 21 - Suppose a patient is receiving oxygen by mask. Are...Ch. 21 - Rapidly metabolizing tissues generate large...Ch. 21 - Prob. 17CYUCh. 21 - What is the relationship between CO2 and pH in the...Ch. 21 - Which brain stem respiratory area is thought to...Ch. 21 - Prob. 20CYUCh. 21 - An injured soccer player arrives by ambulance in...Ch. 21 - Prob. 22CYUCh. 21 - What distinguishes the obstruction in asthma from...Ch. 21 - Prob. 24CYUCh. 21 - Cutting the phrenic nerves will result in (a) air...Ch. 21 - Which of the following laryngeal cartilages is/are...Ch. 21 - Prob. 3RQCh. 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. 13RQCh. 21 - Prob. 14RQCh. 21 - Damage to which of the following would most likely...Ch. 21 - Prob. 16RQCh. 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. 24RQCh. 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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- (a) In humans, is there one pleural cavity surrounding both lungs or two separate pleural cavities, one surrounding each lung? (b) Does this differ from the model lung?arrow_forwardAir moves into the alveoli as a result of the: (A)Decreased pressure in the chest cavity (B) Relaxation of the diaphragm (C) Rising pressure in the alveoli (D) Rising pressure in the chest cavityarrow_forwardGas exchange at the blood air barrier is efficient because, (a) the differences in partial pressure are substantial. (b) the gases are lipid soluble. (c) the total surface area is large. (d) a, b, and c are correct.arrow_forward
- (a) Why is it important that the trachea is reinforced with cartilage rings? (b) Why is it advantageous that the rings are incomplete posteriorly?arrow_forwardIn the respiratory system of humans, there are two zones, conducting and exchange. (a) Name all the parts of the conducting zone and exchange zone (be specific). (b) which parts pf the respiratory tract have the incomplete cartilagenous rings.arrow_forward(b) Explain the breathing mechanism of respiration also discuss the exchange of gases?arrow_forward
- The lungs are mostly passageways and elastic tissue. What is the role of the passageways? Of the elastic tissue?arrow_forward(a) If the chest wall (including parietal pleura) is punctured, would the pressure in the pleural cavity increase or decrease? (b) Would lung size increase or decrease? (c) What is this condition called?arrow_forwardGas exchange in the lungs takes place in the (a) alveoli, (b) bronchioles, (c) segmental bronchi, (d) lobar bronchi.arrow_forward
- Match the proper type of lining epithelium from the key with each of the following respiratory structures.Key: (a) stratified squamous (c) simple squamous (b) pseudostratified columnar (d) stratified columnar(1) nasal cavity(2) laryngopharynx(3) nasopharynx(4) alveoli (type I cells)(5) trachea and bronchiarrow_forward(a) Differentiate clearly between minute ventilation and alveolar ventilation rate. (b) Which provides a more accurate measure of ventilatory efficiency, and why?arrow_forwardA 5-year-old child announces to her parents (former A&P students) that she is going to hold her breath until she is allowed to watch more television. The parents are not worried. (a) Explain why the parents are not worried. (b) Explain how the child’s blood carbon dioxide levels and blood hydrogen ion and bicarbonate ion levels change while she is holding her breath.arrow_forward
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