When we sleep, we generally don't consume water. Decreased water absorption in the intestines reduces the amount of water in the blood. a) How would this impact Na+ concentration in the blood?

b) How might the kidneys regulate Na+ concentration during the night?

c) How would the concentration of Na+ and water in the urine first thing in the morning be different from urine composition later in the day?

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

condensation. good luck!

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

. ph changes the ability of them he enzyme to dissolve in water.