Which is an example of homeostasis?
a) release of insulin after a meal
b) shivering in the cold
c) sweating after exercise
d) all of the above

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.

Which of the following is a feature of all cells? o a. all cells have a nucleus. o b. all cells have dna for at least part of their life cycle. het . o c. all cells are spheres. o d. all cells have a rigid cell wall.