A 30-year-old woman sustains a stage 4 tear in the per- ineum during a difficult delivery. In preparation to repair the tear, an anesthetic nerve block is administered to the pudendal nerve as it courses around the sacrospinous liga- ment. Which of the following areas is most likely blocked by the anesthetic?
A. L2-L4 cutaneous field
B. S1 cutaneous field
C. S2-S4 cutaneous field
D. L2-L4 dermatomes
E. S1dermatome
Ans: C. S2-S4 cutaneous field
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An organelle that contains its own DNA, independent of the nuclear DNA, is the __________.
Fill in the blank(s) with the appropriate word(s).
Frank is experiencing difficulty urinating, painful urination, low back pain and a slight fever. The doctor prescribes antibiotics and Frank recovers. It is likely that Frank suffered from
A) impotence. B) prostate cancer. C) prostatitis. D) a vasectomy. E) a circumcision.
A person with type AB blood receives a transfusion of type O blood. Will there be a transfusion reaction? Why or why not?
A) No: the recipient has no antibodies to antigens A and B, and therefore can receive blood from a type O donor. B) Yes: the recipient must receive blood of the same type as his or her own. C) No: the anti-A and anti-B antibodies of the recipient do not affect the donated blood, because type O blood has no A or B antigens. D) Yes: the anti-A and anti-B antibodies of the recipient clump and hemolyze the donated blood.
A neutral atom will become a cation if it
A. gains neutrons. B. gains electrons. C. loses protons. D. gains protons. E. loses electrons.