It is a process called facilitated diffusion. It could be as simple as bringing in a glucose molecule. Since the cell membrane will not allow glucose to cross by diffusion, helpers are needed. ... That's an easy situation of passive transport because the glucose is moving from higher to lower concentration.
The distance around a person body. the science that studying living organisms
1. Because they are unstable and can share electrons in their outer energy levels.
2. Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.
1. h. channel protein
2. a. energy
3. c. endocytosis
4. d. passive transport
5. f. exocytosis
6. b. facilitated diffusion
7. e. active transport
8. g. carrier protein