How are nutrients absorbed?
What will be an ideal response?
Nutrients move across cell membranes in the small intestine via one of four mechanisms: passive diffusion, facilitated diffusion, active transport, or endocytosis. In passive diffusion, nutrients pass through the cell membrane. In facilitated diffusion, a specific carrier is required but no energy is needed to cross the membrane. In active transport, both a carrier protein and energy to cross the cell membrane. In endocytosis, whole molecules are engulfed by the cell membrane.
You might also like to view...
Most of the leavening in flour mixtures is produced by
a. air incorporated when mixing in the flour. b. carbon dioxide produced by biological or chemical sources. c. steam rising from the flour mixtures. d. steam produced from biological or chemical sources.
Which is the TRUE statement about niacin?
A. It can be synthesized in the body from the amino acid, tryptophan B. Eggs are a good source of preformed niacin. C. Heat and light easily destroy it. D. Corn has a protective effect against niacin deficiencies.
Which of the following is NOT an example of a protein complementation?
a. tofu crumbles and spinach b. peanut butter and jelly sandwich c. trail mix (soybeans and nuts) d. lentil and rice soup
The personality or voice that comes through the text and characterizes the writer for the reader is known as the: a. spirit
b. nature. c. ethos. d. temperament. e. philosophy.