4. Explain how ADH helps the body conserve water. How do variations in ADH secretion affect the volume and concentration of urine

Whenever there's a decrease of blood flow to the kidney, ADH is secreted which trigger the kidneys to reabsorbed water from the urine.

Increase ADH secretion: low volume and highly concentrated urine

Decrease ADH secretion: high volume and poorly concentrated urine (diluted)

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.