Principles of Biology
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, Problem 9TY
Summary Introduction

Introduction:

The respiratory system is mostly influenced by the partial pressure of the oxygen and carbon dioxide, as well as the pH of the blood. Chemoreceptors detect the concentration of oxygen, carbon dioxide and the H+ concentration in the blood.

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Which of the following is not a stimulus of the peripheral chemoreceptors? Increased arterial PCO2 Increased arterial PO2 None of the above stimulate the peripheral chemoreceptors Drop in pH
How will changes in arterial Po2 impact ventilation? Select the one most accurate response. Small changes in arterial Po2 will result in fine changes to VÊ in order to maintain relatively stable arterial Po2. O Arterial Po2 will not affect ventilation unless it drops below 60mmHg. O₂ cannot cross the blood/brain barrier, thus cannot interact with central chemoreceptors to have an impact on ventilation. O Breathing 100% O2 at atmospheric pressure will greatly reduce the urge to breathe.
All of the following factors increase hemoglobin's affinity for oxygen EXCEPT:   Increased temperature   Increased pH   Decreased pCO2   Decreased 2,3-DPG   All of the above increase hemoglobin's affinity for oxygen The conduction zone:   Question 7 options:   participates in some gas exchange   secretes mucus which is moved down into the respiratory zone of the lungs   dries moist air as it moves into the respiratory zone   equilibrates incoming air to body temperature   none of the above are correct The respiratory membrane for gas exchange includes (select the best answer):   Question 8 options:   Capillary endothelial cells   Type I alveolar cells   Type II alveolar cells   A and B above   A and C above
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Respiratory System; Author: Amoeba Sisters;https://www.youtube.com/watch?v=v_j-LD2YEqg;License: Standard youtube license