Kayla summarizes the cell theory for her class. she begins by stating that all organisms are made up of one or more cells. which of the following statements would correctly complete her summary?

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

The effect of a hormone on a target cell may be decreased by the presence of

4emphysema is a health condition in which the lungs can no longer expel carbon dioxide normally. as a result, a person who has emphysema may have high blood acidity levels. the body process that would attempt to return the blood ph to normal so that cells could function properly is called a. active transport b. acidosis c. homeostasis d. adaptation