Question 1
Cystic fibrosis affects the digestive system and the
◦ liver.
◦ brain.
◦ kidneys.
◦ heart.
◦ lungs.
Question 2
Digestion of tissues in the stomach wall by gastric juice is usually prevented by
◦ only the secretion bicarbonate.
◦ a covering of mucus, exclusively.
◦ intrinsic factor alone.
◦ secretion of bicarbonate and a covering of mucus.
◦ secretion of protein-digesting enzymes in inactive form and a covering of mucus plus intrinsic factor.