Why is a double-blind, placebo-controlled experiment considered the best type of food challenge test to perform?
A) Because a test is more reliable when the researcher knows who is getting the placebo.
B) Because the patient should not know if he/she is receiving the placebo or suspected offending food.
C) Because the researcher should not know whether the patient is receiving the placebo or suspected offending food.
D) Because blind people are usually more honest in these tests since they cannot see the food.
E) b and c
E
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Which of the following defines nursing bottle tooth decay?
a. Development of caries resulting from frequent use of non-sterile bottles and nipples. b. Bacterial attack of teeth due to use of lead-rich drinking water. c. Extensive tooth decay infant due to prolonged exposure to carbohydrate-rich fluids from a bottle. d. Tooth decay resulting from prolonged exposure to soft food due to the infant’s inability to swallow normally. e. Tooth decay resulting from the rubbing of the nipple against the teeth and consequent thinning of enamel.
The first signs of vitamin C deficiency appear in the:
a. blood vessels. b. bones. c. hair. d. fingernails.
In the human body, water is involved in ________.
A. digesting foods B. protecting cell membranes from oxidants C. regulating energy metabolism D. storing wastes
Dialysis removes excess fluids and wastes from the blood by employing the principles of diffusion, osmosis, and ultrafiltration
a. True b. False Indicate whether the statement is true or false