Freckles are the result of
A. sun exposure.
B. heredity.
C. excessive melanocyte activity.
D. All of the choices are correct.
E. None of the choices are correct.
Answer: D
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Vision impairment as a result of old age and loss of elasticity in the lens is called ________.
A. astigmatism B. myopia C. presbyopia D. diplopia
Peripheral resistance ________.
A) decreases with increasing length of the blood vessel B) increases as blood vessel diameter increases C) increases as blood viscosity increases D) is not a major factor in blood pressure in healthy individuals
Which statement about anabolic steroids would lose points on a test?
A. Injected into muscles, they activate growth genes that lead to larger muscles. B. They can lead to liver damage. C. They can lead to heart disease. D. They are safe to use. E. They promote high blood pressure.
Which biological catalyst lowers the activation energy of a reaction?
A) salt B) enzyme C) carbohydrate D) lipid