Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 48, Problem 7TY
The countercurrent exchange mechanism in fish gills
- a. maximizes oxygen diffusion into the bloodstream.
- b. is a less efficient mechanism for gas exchange than that used in mammalian lungs.
- c. occurs because the flow of blood is in the same direction as water flowing across the gills.
- d. facilitates diffusion of carbon dioxide into the blood of the fish.
- e. facilitates diffusion of oxygen to the environment.
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Which of the following is a true statement?
A. The concentration of oxygen in water is greater than that in air.
B. In animals with gills, ventilation helps to reduce the thickness of the
boundary layer.
C. Countercurrent flow at the gas-exchange surface results in the
diffusion gradient across surface.
D. Mammalian lungs requires the diaphragm because the lungs are
relatively stiff and filled with parabronchi.
According to the Fick equation, the fish gill is an effective gas exchange surface because...
A. It has a high blood-to-water diffusion distance
B. The total surface area of the lamellae is very large
C. The scaphognathite maintains a constant flow of water across the gill
D. The gill tissue is supported by the surrounding water
E. All of the above
The countercurrent exchange system for gills relies on diffusion to diffuse
oxygen into the blood. This system works because the blood in the gills.
a. increasing
encounters [Select] b. decreasing
water as the blood moves from [Select]
a. arteries
[Select] b. capillaries
c. Veins
✰ concentrations of oxygen in the
a.arteries
b. capillaries to
C. veins
through the capillaries. This also ensures that
a. less
blood always has [Select] b. more
c. the same amount of
oxygen than the water for
continued diffusion.
Chapter 48 Solutions
Biology
Ch. 48.1 - Prob. 1CCCh. 48.1 - Prob. 1CSCh. 48.2 - Core Skill: Connections Leukocytes are part of the...Ch. 48.3 - Prob. 1CCCh. 48.3 - Prob. 2CCCh. 48.4 - Do erythrocytes enter and exit through pores in...Ch. 48.7 - Prob. 1CSCh. 48.7 - Prob. 1CCCh. 48.7 - Prob. 2CCCh. 48.8 - Prob. 1EQ
Ch. 48.8 - Prob. 2EQCh. 48.8 - Prob. 3EQCh. 48.9 - Prob. 1CCCh. 48.10 - Prob. 1CSCh. 48 - Prob. 1TYCh. 48 - Prob. 2TYCh. 48 - A major advantage of a double circulation is that...Ch. 48 - Prob. 4TYCh. 48 - For blood flow through a closed circulation, which...Ch. 48 - Prob. 6TYCh. 48 - The countercurrent exchange mechanism in fish...Ch. 48 - The tracheal system of insects a. consists of...Ch. 48 - Prob. 9TYCh. 48 - Prob. 10TYCh. 48 - Prob. 1CQCh. 48 - Prob. 2CQCh. 48 - Prob. 3CQCh. 48 - Prob. 1COQCh. 48 - List the components of the mammalian respiratory...
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