In the fall semester, Matthew contracted pneumonia and had to drop his classes and return home to recuperate. He was already underweight, and he lost more weight during his illness. Up to how many extra Calories a day should he consume to regain to a healthy weight?

A. 3,500 kcal/day
B. 250 kcal/day
C. 3,000 kcal/day
D. 1,000 kcal/day

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

Which of the following is the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin