Phospholipids have a hydrophilic head and a hydrophobic tail
Indicate whether statement is true or false.
ANS: T
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Lipids and carbohydrates are composed of the same chemical elements, but in differing amounts.
a. true b. false
If enough sodium enters a nerve cell, the resulting change in electrical charge will trigger
A) an action potential. B) repolarization. C) a corresponding flow of potassium into the cell. D) a muscle contraction.
What percent of all food produced is never consumed due to waste or spoilage?
A) 33 B) 23 C) 13 D) 43
Which of the following individuals would benefit most from choosing a sports drink instead of water?
A. An elderly adult B. An athlete who competes in a marathon C. An athlete who competes in the 100-meter dash D. A student who needs to stay up late to study for an exam