Describe an experiment you would design to test the following hypothesis: Vitamin C supplements cure colds
What will be an ideal response?
An appropriate experiment would involve two groups of individuals of the same sex and age. All individuals are exposed to cold viruses via inhalation. They then are divided into two groups: an experimental group that receives identical doses of vitamin C supplements and a control group that gets a placebo. The experiment is double-blind. Signs and symptoms of both groups are tracked over 10 days. After data collection and analysis, conclusions are made as to whether the vitamin C had an effect on the cold.
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Which exhibits a definite positive correlation?
a. 05-.07 b. 1.2 -1.3 c. 0.8-1.0 d. 0.2-0.9
Which of the following is not true about vitamin A deficiency?
a. it is a major cause of blindness worldwide. b. it may be caused by insufficient intake of vitamin A, fat, protein, or zinc. c. it is not a world health problem. d. it is not common in developed countries
Intrarenal factors account for about _____ of acute renal failure
a. 10% to 25% b. 25% to 40% c. 40% to 65% d. 70% to 85%
Which indicator is not a sign of fluid retention?
a. tight-fitting shoes b. puffy face c. abdominal distension d. reduced skin tension e. decreased urine production