Only 1 in 1,000 sperm will ever arrive in the vicinity of an ovum. Which of the following factors prevent sperm cells from traveling the entire distance to the egg?
a. gravity c. current of fluid from the cervix
b. vaginal acidity d. all of these
D
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If we have the possibility of different numbers of subjects in each of two groups, we will maximize our power if
a. we put most of the subjects in the group we care most about. b. we put most of the subjects in the group we care least about. c. we equalize the number of subjects in the two groups. d. it doesn't make any difference so long as we maximize the total number of subjects overall.
Which of the following is NOT a term used to describe the motive state generated by external stimuli?
a. curiosity b. exploratory drive c. motive state excitement d. need for stimulation
The condition known as "fragile bones" is called
muscular dystrophy cerebral palsy dementia osteoporosis
An instrument for dilating the vagina to examine the cervix and other internal structures is known as a ____
a. curettage c. smegma b. fimbriae d. speculum