16. Question : What is the life span of an erythrocyte (in days)?

17. Question : Which hepatitis virus is known to be sexually transmitted?

18. Question : An infant has a loud, harsh, holosystolic murmur and systolic thrill that can be detected at the left lower sternal border that radiates to the neck. These clinical findings are consistent with which congenital heart defect?

19. Question : The risk for respiratory distress syndrome (RDS) decreases for premature infants when they are born between how many weeks of gestation?

20. Question : An infant’s hemoglobin must fall below ___ g/dl before signs of pallor, tachycardia, and systolic murmurs occur.