What percentage of plasma is water?
A. 8%
B. 55%
C. 45%
D. 92%
Answer: D
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Hyperventilation is usually accompanied by a(n)
A. decrease in blood CO2 concentration and a drop in pH. B. increase in blood CO2 concentration and a rise in pH. C. increase in blood CO2 concentration and a drop in pH. D. decrease in blood CO2 concentration and a rise in pH.
Which of the following is NOT a method of hormone action?
A) control of gene expression and protein synthesis B) control of enzymatic reaction rates C) control of ion or molecule transport across cell membranes D) control of electrical signaling pathways E) All are methods of hormone action.
Answer the following questions true (T) or false (F)
1. The pharynx is known as the voice box due to the presence of vocal ligaments that vibrate to produce sound. 2. The last tracheal ring of cartilage, known as the carina, has sensory receptors that can trigger a cough reflex. 3. Rings of cartilage increase in number while smooth muscle presence decreases as the bronchi branch and become smaller in the conducting zone.