What percentage of the body's cardiac output is received by the kidneys?
1. 5% to 10%
2. 20% to 25%
3. 30% to 35%
4. 45% to 50%
2
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Answer the following statements true (T) or false (F)
1. Vigorous exercise just before sleep raises an individual’s core body temperature and induces drowsiness and deeper sleep. 2. One should avoid eating heavy meals within three hours of bedtime, particularly meals with high fat content. 3. An individual napping more than 45 minutes will be less groggy than an individual napping 15–45 minutes. 4. Research has shown that people sleeping in an upright position have sleep that is poor in quality compared to those who sleep in a horizontal position. 5. If you have a hard time falling asleep, a good strategy is to make yourself stay in bed as long as it takes you to fall asleep.
Which of the following changes in the cardiovascular system is not linked to chronic stress?
A. increased heart rate B. increased serum cholesterol levels C. indigestion D. the blood thickens
Which of the following is (are) NOT one of the formed elements of the blood?
a. red cells b. platelets c. white cells d. plasma
What is the main cause of skin cancer?
A. heredity factors B. chemicals in skin care products C. sun overexposure D. a high-fat diet E. recurrent skin infections