A 16-year-old biker was brought to the emergency room after getting mauled by a couple
stray dogs on his way home from school. He hops on his left leg, although his right foot
remains close to the ground. When asked to flex his right knee, he says he is unable to do it.
Physical examination shows multiple bite marks around the right thigh. What are the most
likely origins of the damaged nerve?
- A. L2-L4
- B. L4-S1
- C. L4-S2
- D. L4-S3
- E. L5-S2
0 voters
A 26-year-old woman comes to her physician complaining of blistering sores on the edges of
her mouth. She says they come and go, but she is extremely annoyed that they always
appear when she is stressed. Oral acyclovir is prescribed. Two weeks later, she returns to
the physician complaining that the medication is useless. What is the most likely cause of the
ineffectiveness of acyclovir?
- A. The drug was blocked by “first pass” metabolism in the liver.
- B. The drug’s half life was too short.
- C. The drug was consumed by macrophages.
- D. The virus lacks thymidine kinase (TK).
- E. Acyclovir only works as a topical medication for this type of infection.
0 voters
A 20-year-old man is rushed to the emergency room with extreme nausea, vomiting and
diaphoresis. He was bitten by a rattlesnake an hour ago. His blood pressure is 100/60 and
respirations are 32 breaths/minute. Physical examination shows an erythematous rash with
two puncture wounds on the dorsum of the left wrist. Antivenin is quickly started. This
antivenin is cultured by inoculating rattlesnake venom into a horse and then retrieving the
horse’s serum. Administration of this antivenin into the patient is an example of what type of
immunity?
- A. Natural active
- B. Natural passive
- C. Artificial active
- D. Artificial passive
0 voters