Drugs That Are Large in Size Are Not Able to Cross

question 6

Short Answer

Drugs that are large in size are not able to cross a membrane.[dropdown 1] involves engulfment of a drug by the cell membrane and transports it inside the cell by pinching off the filled vesicle.Vitamin B₁₂ is transported this way.Many neurotransmitters, like norepinephrine,are stored in vesicles and released to the outside of the cell by [dropdown 1].
Dropdown Choices:
Endocytosis
Exocytosis
Facilitated diffusion
Osmosis
Simple diffusion

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Definitions:

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