Oxygen debt in muscles may develop because of
A) too much oxygen used in forming pyruvic acid when skeletal muscles are contracted
strenuously for a minute or two.
B) the inability of myoglobin molecules to store enough oxygen when skeletal muscles
are used strenuously for a minute or two.
C) too high a concentration of oxygen in the atmosphere.
D) the inability of respiratory and circulatory systems to supply enough oxygen to
skeletal muscles when used strenuously for a minute or two.
D
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Which of the following gives a cell structural support, determines the shape of a cell, and directs the movement of substances through a cell?
A. Cholesterol B. The nucleus C. The plasma membrane D. The Golgi complex E. The cytoskeleton
In which of the following regions of the nephron is water actively transported?
A) None of the above B) Peritubular capillaries C) Descending limb of the nephron loop D) Proximal convoluted tubule
If a substance can permeate the membrane, its rate of simple diffusion is inversely proportional to its concentration gradient
a. True b. False Indicate whether the statement is true or false
Who experiences a greater amount of bone deposition: a person who routinely exercises or a sedentary person? Explain your choice
What will be an ideal response?