The organ of the body that plays a key role in regulating blood pressure by controlling the secretion of hormones involved in vasoconstriction and retention of sodium and water is the _____.
Fill in the blank(s) with the appropriate word(s).
kidneys
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Which of the following foods are reliable dietary sources of vitamin D?
A. Fresh fruits B. Fortified dairy products C. Processed luncheon meats D. Refined breads and cereals
Which statement best describes a function of cholesterol? a. It mixes with fat and water to suspend fat molecules within fluid. b. It is an important lipid in the structure of brain and nerve cells. c. It protects other compounds by reacting with oxygen. d. It reduces inflammation in arthritis and asthma sufferers
e. It changes the chain length of carbon atoms in fatty acids.
It has been estimated that about 25% of deaths in the United States can be attributed to poor diet and a sedentary lifestyle.
a. true b. false
Why are manufacturers of dietary supplements not required to secure approval to sell their products??
A) ?because they are not medicines B) ?because they are always safe C) ?because they actually are not effective D) ?because they are sold in very low doses