Capillaries have the slowest velocity because
A. the total cross-sectional area is the smallest.
B. the resistance is the greatest.
C. the total cross-sectional area is the largest.
D. their diameters are the smallest.
C
You might also like to view...
Increased secretion of atrial natriuretic hormone results in
A. increased thirst. B. increased urine output. C. increased blood pressure. D. increased osmolality of the extracellular fluid. E. decreased urine output.
If extracellular fluid osmolality is 385 mOsm/kg, the kidneys will increase reabsorption of ________.
A. urea B. water C. K+ D. Cl? E. Na+
Calcium that is needed to activate cross-bridging in smooth muscle mainly comes from ________.
A. extracellular fluid B. endoplasmic reticulum C. dense bodies D. intracellular fluid
Which system's function is to drain tissue fluid and keep it free of pathogens?
A. Lymphatic system B. Integumentary system C. Muscular system D. Urinary system