Chapter 31 - Excretion

Question 1

ectotherms

Answer 1

gain or lose heat from or to their external environment

Question 2

endotherms

Answer 2

generate their own heat from metabolic reactions

Question 3

filtration

Answer 3

water and small molecules pass (under high pressure) from the blood into the nephron

Question 4

reabsorption

Answer 4

molecules pass from the nephron back into the blood

Question 5

active transport

Answer 5

energy (in the form of ATP) is used to move molecules, often against a concentration gradient, i.e. from low concentrations to high concentrations

Question 6

secretion

Answer 6

some substances pass from the blood into the nephron