8/22/12

Question 0

Testicular torsion is a twisting of the _______ around the _______.

Answer 0

testes; spermatic cord

Question 1

What are 2 common causes of acute orchitis in adolescents and young adults? In the elderly?

Answer 1

C. trachomatis and N. gonorrhoeae.

E. coli

Question 2

What deformity can predispose to testicular torsion?

Answer 2

“Bell-clapper deformity” - congenitally horizontal testes

Question 3

Equation for standard error of the mean (SEM)

Answer 3

SD / sqrt(n)

Question 4

What is the z-score for a 95% confidence interval? a 99% CI?

Answer 4

1. 96

2. 58

Question 5

What enzyme in homocysteine metabolism requires folate?

Answer 5

methionine synthase (aka homocysteine methyltransferase)

Question 5

What substrate builds up only in the case of B12 deficiency (not folate deficiency)?

Answer 5

methylmalonyl-CoA

can’t be converted to succinyl-CoA

Question 6

Which Th cells are responsible for coordinating humoral immunity?

Answer 6

Th2

Question 7

How does silicosis predispose to TB infection?

Answer 7

impairs macrophage killing

Question 8

What is the most reliable indicator of the severity of mitral valve stenosis on auscultation?

Answer 8

S2 to opening snap interval - inversely correlated to severity (i.e. shorter interval = more severe stenosis)

Question 9

Equation for 95% CI.

Answer 9

mean +/- 1.96 * SEM

[where SEM = SD / sqrt(n)]