The first heart sound (lubb) is associated with A) atrial ...

[KWilfred]

The first heart sound (lubb) is associated with
 A) atrial systole.
  B) closing of the atrioventricular valves.
  C) opening of the atrioventricular valves.
  D) closing of the semilunar valves.
  E) opening of the semilunar valves.

Question 2

The reproductive system includes all of the following except
 A) gonads and external genitalia.
  B) ducts that receive and transport the gametes.
  C) accessory glands and organs that secrete fluids.
  D) organs for copulation.
  E) glands and organs that produce and store urine.

[lkoler]

Answer to Question 1

B

Answer to Question 2

E

[KWilfred]

Great answer, keep it coming

[AmberC1996]

Excellent