
Noah P. answered 08/17/20
Tutor
5
(2)
I am a third year medical student
Hey Areli,
You can think of the transport of material from the environment to the interior of a cell in two categories:
- Diffusion - diffusion can further be broken down into:
- Active Transport - requiring energy e.g., uptake of glucose in the intestines
- Passive Transport - does not require energy e.g., water (osmosis)
- Endocytosis - endocytosis refers to a cell "sampling" or "eating" larger material. This too can be further subdivided.
- Pinocytosis - some cells like to sample their environment to inform behavior. This an be thought of as "drinking" a big gulp of water.
- Phagocytosis - some cells that are programmed to destroy other cells, due so by "eating" the other cell, e.g. macrophages (human immune system)
- Receptor-mediated Endocytosis - Some cells are designed to absorb large molecules in the environment by recognizing them first with surface receptors, and the absorbing them, e.g., clathrin-coated pits.
Let me know if this helps,
Noah Pyles