Human Biology (MindTap Course List)
11th Edition
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cecie Starr, Beverly McMillan
Chapter10: The Respiratory System
Section: Chapter Questions
Problem 3SQ: Oxygen in air must diffuse across______ to enter the blood. a. pleural sacs b. alveolar sacs c. a...
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Question
1. What helps to maintain a concentration gradient between blood and the air in the alveolus?
A. The flow of blood through the lungs
B. The presence of haemoglobin in blood cells
C. The single-celled alveolar walls
D. The squamous epithelium of capillaries
Please solve fast max 15 minutes and no reject thank u
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