Question 1
The graph below had its labels removed. One axis is plasma osmolarity. The other axis is EITHER plasma vasopressin concentration OR plasma aldosterone concentration. Write the correct label on each axis of the graph, and explain how you came to that conclusion.

Question 2
Which are most closely regulated by the body?
◦ absorption and motility
◦ secretion and digestion
◦ motility and secretion
◦ digestion and motility
◦ motility, secretion, and digestion