A deficiency in the enzyme G6PD confers resistance to the disease _______________. Fill in the blank(s) with the appropriate word(s)
ANS: malaria
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Which structure(s) could be considered to be blood reservoirs?
a. arteries b. arterioles c. capillaries d. heart e. veins
Which of the following solutions would require the addition of the greatest amount of base to bring the solution to neutral pH?
A) gastric juice at pH 2 B) vinegar at pH 3 C) black coffee at pH 5 D) household bleach at pH 12
Environmental air temperature can fluctuate many degrees during the course of a day. A human's body temperature
A. can also fluctuate many degrees. B. must be maintained within a range of a few degrees. C. is raised by sweating and dilation of blood vessels in the skin. D. is not maintained internally but fluctuates with the air temperature. E. is lowered by shivering.
The menstrual cycle and ovulation are coordinated
A. so that ovulation occurs when the uterus has a thick lining. B. because hormones produced by the uterus stimulate the ovary. C. by changes in body temperature. D. None of the above is correct.