1. vitamin d is converted to its active form by the a. skin and liver. b. small intestines and kidneys. c. fat tissue and liver. d. kidneys and liver. e. skin and small intestine.

15 min. leftread about what these classmates had for lunch and identify the missing terms. mark eats whole-wheat pasta mixed with vegetables for lunch. for dessert, he has a cherry popsicle. the whole-wheat pasta and fresh vegetables will be digested (faster than, slower than, at the same rate as) the popsicle.