Urine is propelled along the ureters by peristaltic waves of muscular contractions.

true
false

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.