The protective mechanism that involves an external stimulus leading to an immediate muscular contraction is called
a. a depolarization potential.
b. an action potential.
c. a reflex arc.
d. a stimulus threshold.

Advertisements are filled with images of extremely fit and sometimes even underweight people. what is an example of how these images might positively influence a person’s health choices? a) choosing to use weight loss supplements to increase weight loss b) electing to skip meals to reduce calorie intake until target weight is met c) figuring out ways to purge after meals to reduce the number of calories consumed d) finding ways to increase physical activity to burn calories and increase heart weight

Which of these is likely to be the best source of valid health information?

Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids