8. The function of the kidney is to excrete extra: A. urea, salts and water
B. urea, water and amino acids
C. urea, carbohydrates and water
D. urea, salts and sugars

Because of its structure the cell membrane is known as a phospholipid ? a.bilayer b.molecule c.fluid d.barrier

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen