Biology: Concepts and Investigations
Biology: Concepts and Investigations
5th Edition
ISBN: 9781260542202
Author: Marielle Hoefnagels
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 31, Problem 7MCQ
Summary Introduction

Introduction:

Respiratory system is the body system whose function is to get oxygen from the environment and remove carbon dioxide from the body.

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which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli? a. passive transport using a carrier proteins b. active transport using energy c. conversion to carbon dioxide d. diffusion down a concentration gradient
The trachea has rings of cartilage to: a. Allow the trachea to close when air is not present b. Keep the trachea open for continuous air flow c. Allow the trachea to close when food is not present d. Keep the trachea open for continuous food flow
What occurs as air descends down through the conducting zone and respiratory zone structure? a. Cartilage rings are replaced by plates of Cartilage. b. Resistance to air flow decreases due to increased number of lobbies. c. Resistance to air flow increases as bronchioles diminish in diameter. d. Smooth muscle surrounding the bronchioles increases . e. The lining of the bronchioles changes from ciliated columnar to simple squamous epithelium.
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