Why should consumers be skeptical about ingesting melatonin supplements or any other dietary supplement sold in vitamin or health stores?
What will be an ideal response?
Dietary supplements have been sold for many years around the world. Although the logic behind taking some of these supplements seems to be sound, there is usually very little if any scientific evidence supporting these dietary supplements. Dietary supplements are not regulated by the FDA, and as long as there is no evidence of harmful effects, the companies that manufacture these supplements are allowed to claim whatever they feel is appropriate to sell more of their product.
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What is the function of the bicarbonate ions secreted by the pancreas?
A. to prevent enzymes that digest carbohydrates and fats in the small intestines from becoming denatured B. to stimulate the release of bile from the gall bladder C. to stimulate secretion of the hormone secretin D. to facilitate the transport of nutrients across the intestinal wall E. All of the answer options are correct.
Which substance is not capable of diffusing across the endothelial cells of a capillary? a. Carbon dioxide b. None are capable of diffusing across the endothelial cells
c. All are capable of diffusing across the endothelial cells. d. Small lipid soluble molecules e. Oxygen
This arthropod has a single pair of antennae,
three pairs of legs, and a chitin cuticle. This arthropod is ___.
a. a crab b. a tick c. an isopod d. an ant e. more than one of these
Standard Precautions in the microbiology laboratory apply to:
a. all clinical specimens. b. clinical specimens that contain blood or body fluids. c. blood, body fluids, feces, sputum, saliva, urine, and vomitus. d. only specimens that are visibly bloody.