In a healthy person, which of the following will have the greatest influence on resistance to pulmonary airflow?
A. Contraction of the diaphragm
B. Atmospheric pressure
C. Respiratory rate
D. Quantity of surfactant
E. Bronchiole diameter
Answer: E
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Skeletal muscles are attached to bones via _______.
Fill in the blank(s) with the appropriate word(s).
Polycythemia is best defined as a
A) lower than normal concentration of leukocytes. B) higher than normal concentration of leukocytes. C) higher than normal concentration of erythrocytes. D) higher than normal concentration of protein in the plasma. E) lower than normal concentration of erythrocytes.
Charlie is 55 years old and is 45 pounds overweight. Like most men of his age, he carries the weight in his abdomen and jokes about his "beer gut." Due to the extra weight, his spine is developing an abnormal curvature. Explain why the curvature of his
spine is changing and name this condition. What will be an ideal response?
Which of the following cell types is not found in the dermis?
a. fibroblasts b. chondrocytes c. mast cells d. neurons