How would a decrease in the oxygen concentration in the lungs affect oxygen diffusion in the blood?
What will be an ideal response?
Diffusion is driven by a concentration gradient. The steeper the concentration gradient, the faster the rate of diffusion; the lower the concentration gradient, the slower the rate of diffusion. If the concentration of oxygen in the lungs were to decrease, the concentration gradient between oxygen in the lungs and oxygen in the blood would decrease (as long as the oxygen level of the blood remained constant). Thus, oxygen would diffuse more slowly into the blood.
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Normal activities usually involve _____ movements.
A. abduction and extension B. flexion and pronation C. single D. combination
The calcium hydroxide experiment demonstrates that
A. there is a much higher concentration of CO2 in expired air than in atmospheric air. B. there is a much higher concentration of O2 in expired air than in atmospheric air. C. the concentrations of CO2 in expired air and atmospheric air are approximately equal. D. there is a much lower concentration of O2 in expired air than in atmospheric air. E. there is a much lower concentration of CO2 in expired air than in atmospheric air.
Biomechanics has roots in which of the following disciplines?
A. physics B. biology C. both A & B D. neither A nor B
In the elastic arteries, which of the tunics have elastic fibers?
A. Tunica intima B. Tunica externa C. Tunica media and tunica externa D. Tunica media E. Tunica media, tunica intima, and tunica externa