Cell Exchange Flashcards
(6 cards)
1
Q
Diffusion
A
High→low concentration
2
Q
Osmosis
A
Lower concentrated solution →high Higher H2O concentration →low Hypotonic →hypertonic Hyperosmotic → hypo Higher water potential →low
3
Q
Water potential equation
A
ψ (cell) = ψs + ψp
Cell water potential=solute potential (of cell’s ions)+pressure potential (of cell wall)
ψ = water potential
4
Q
ψp value
A
Above 0 when membrane starts to contact wall
↑ψp, more cell wall resists water entry
5
Q
Active transport
A
Goes against higher concentration gradient via protein carrier molecule.
E.g. Small intestine: Na+ ions are pumped out of epethelial cells. Allows glucose and Na+ to diffuse into cell cia co-transporter system
6
Q
Pinocytosis
A
Fluids enter cell by endocytosis. Called phagocytosis or bigger particles
