47. The heart murmur is due to complete closure of the pulmonary valve and regurgitation of pulmonary trunk blood during diastole.

28. The parietal pericardium ________.        

14. Which statement about CO2 is FALSE?  

6. The secretions of the bulbourethral glands neutralize traces of acidic urine in the urethra and serve as a lubricant during sexual intercourse.

19. Secretion of progesterone stimulates ________.        

39. The left side of the heart pumps the same volume of blood as the right.

43. Systole is contraction of the muscle. Diastole is relaxation of the muscle. 

24. THINK: Select the correct statement about oxygen transport in the blood.  

47. Which hormone is NOT produced by the placenta?    

1. The Pap smear is a test to detect cancerous changes in cells of the cervix.