Answer to Question 1
ANS: D
As capillaries become engorged, the upper respiratory tract is affected by the subsequent edema and hyperemia, which causes these conditions, seen commonly during pregnancy. Progesterone is responsible for the heightened awareness of the need to breathe in pregnancy. Progesterone levels increase during pregnancy. The client should be reassured that these symptoms are within normal limits. No referral is needed at this time. Relaxation of the smooth muscles in the respiratory tract is affected by progesterone.
Answer to Question 2
ANS: B, C
The foramen ovale shunts oxygenated blood from the right atrium to the left atrium, bypassing the lungs. The ductus venosus shunts oxygenated blood from the liver to the inferior vena cava. All shunts close after birth. The ductus arteriosus shunts blood from the right ventricle to the aorta.