What is the most important determinant of vascular resistance?
a. differences in the length of the blood vessels
b. friction between the blood and the vessel walls
c. the diameter of the arterioles
d. a combination of neural and hormonal mechanisms
Answer: b. friction between the blood and the vessel walls
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Starch is the stored carbohydrate in plants, while ________ is the stored carbohydrate in animals.
Fill in the blank(s) with the appropriate word(s).
Inspiratory events occur because
a. the air pressure in the alveoli is greater than that of the atmosphere b. the air pressure in the alveoli is less than that of the atmosphere c. the volume of the thoracic cavity increases d. of conditions a and b e. of conditions b and c
Following ovulation, the ruptured follicle is transformed into the ____________________
Fill in the blank(s) with correct word
Cells that process antigen and present antigens to other immune cells are called
A. plasma cells. B. antigen-presenting cells. C. B receptor cells. D. T suppressor cells. E. antibodies.