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Endocytosis (into the cell) and exocytosis (out of the cell) are used to transport molecules that are too large to get through the cell membrane otherwise.

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Does the process of endo and exocytosis require energy?

Yes, both endocytosis and exocytosis require energy in the form of ATP to transport molecules across the cell membrane.


What is excytosis?

Exocytosis is a process by which cells release molecules outside of the cell. It involves the fusion of vesicles containing the molecules with the cell membrane, leading to the release of the vesicle contents into the extracellular space. This process is important for communication between cells and for the secretion of various substances such as hormones and neurotransmitters.


What happens to cells in a hypotonic environment?

In a hypotonic environment, cells take in water via osmosis, causing them to swell and potentially burst if the cell wall is not strong enough to withstand the influx of water.


When a vesicle fuses with the cell membrane to get rid of a particle what happens?

a vesicle does not fuse with the cell membrane. The cell membrane goes through endo- or exocytosis to absorb or eject a substance. In this case, exocytosis occurs, so the cell membrane engulfs the particle, pumps it through the membrane with the help of transport proteins, and then the vesicle breaks off and is gone.


How does the meaning of the root words endo- and -symbiosis help you understand the meaning of endosymbiosis?

The root "endo-" means within or inside, while "symbiosis" refers to a relationship between two different organisms. Endosymbiosis specifically describes a symbiotic relationship in which one organism lives inside the other. In the context of endosymbiosis theory, it explains how certain organelles like mitochondria and chloroplasts originated from engulfed prokaryotic cells living symbiotically within a host cell.