The mechanism to maintain a neutral pH of body fluids is known as __________.
a. polarity of water
b. osmosis
c. thirst mechanism
d. acid-base balance
Ans: d. acid-base balance
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Which of the following are required components of antioxidant enzyme systems?
A) antioxidant vitamins B) gastrointestinal microflora C) phytochemicals D) antioxidant minerals
If someone who is trying to lose weight reduces their calorie intake by 800 kcal per day and maintains the same calorie intake for the duration of their weight loss, the rate of weight loss will continually slow. What is the best explanation for this continued slowing in the rate of weight loss?
a.) As body weight decreases, the calorie deficit decreases. b.) The longer they are on the diet, the less body water they lose. c.) They are less physically active. d.) To conserve energy, the body continually adjusts metabolic rate downward.
A well-balanced diet includes all of the following actions except
A) consuming phytochemicals and fiber. B) relying on dietary supplements. C) consuming essential nutrients. D) eating a variety of foods.
In most states, the legal limit for BAC for the driver of a car is _____
a. 0.03 b. 0.08 c. 0.1 d. 0.15