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Lecture 6

BIO SCI 93 Lecture Notes - Lecture 6: Passive Transport, Active Transport, PlasmolysisPremium


Department
Biological Sciences
Course Code
BIO SCI 93
Professor
WOOD, M., GREEN, K., BUSCIGLIO, J
Lecture
6

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Biology 93
Cell membrane
Selectively permeable
Hypotonic- water enters the cell at a rapid speed
Animal cell- cell becomes too full of water and explodes (lysed)
Plant cell- normal, turgid because the uptake of water is balanced through
the rigid cell wall
Isotonic- no net movement of water. Water enters and leaves cell at the same
rate
Animal cell- Normal state
Plant cell- Cell becomes flaccid (limp)
Hypertonic- water leaves cell
Animal cell- cell lose water, shrivel, and die
Plant cell- plasmolysis; plant wilts and die
https://biowithvanessa.wordpress.com/2013/03/01/hypotonic-hypertonic-isotonic-
differences/
Transport Proteins Provide Passages
Hydrophilic, ions that are charged, and large molecules go through passages
from transport proteins
There’s a specific transport protein for each
I.e. water= aquaporin channels
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