The kidney functions in
a. preventing blood loss
b. white blood cell production
c. synthesis of vitamin E
d. excretion of nitrogenous wastes (such as urea)
e. production of the hormone aldosterone
The portion of the nephron that empties into the collecting duct is the
a. glomerulus.
b. ascending loop of Henle.
c. distal convoluted tubule.
d. proximal convoluted tubule.
e. descending loop of Henle.

The diagram illustrates an absorptive structure in the duodenum. What does “A” represent?
a. microvilli
b. epithelial cell
c. capillary
d. lacteal
e. villus
Nutrition includes the study of
a. the nutrients in foods
b. the body’s utilization of nutrients
c. how nutrients play a role in your body’s health
d. digestion, absorption, and transportation of nutrients
e. All of these choices are correct