Calcium ions are normally in higher concentrations outside most living cells than within cells. Which of the following processes is most likely responsible for this condition?
A. simple diffusion
B. facilitated diffusion
C. osmosis
D. active transport
Answer:D
Calcium ions are normally in higher concentrations outside most living cells than within cells. Which of the following processes is most likely responsible for this condition?
A. simple diffusion B. facilitated diffusion C. osmosis D. active transport