Bio107-ch3lab4 Flashcards
Cell/plasma membrane
surrounds cell, regulates what goes in and out of it
Phospholipid bilayer
protects the cell, part of the cell membrane
Phospholipid bilayer (2 parts)
- Head 2. Tails
Heads are
hydrophilic and on the outside
Tails are
hydrophobic and on the inside
Hydrophilic
likes water
Hyrdophobic
does NOT like water
Cholesterol adds ___ to the cell membrane
structure
Glycoprotein
helps the body recognize itself and organs (blood type, organ transplant- meds to trick the glycoprotein)
Functions of cell membrane (2 main)
- Transport 2. Enzymatic
Transport
read in book
Enzymatic
read in book
PASSIVE Membrane Transport (2)
going with the gradient
“go with the flow”
Passive membrane transport (3 main types)
- Simple diffusion 2. Facilitate diffusion 3. Osmosis
Simple diffusion- PASSIVE (3)
- no ATP req. 2. movement of O2 through cell membrane 3. perfume disperses after time & isn’t as strong
Facilitated diffusion- PASSIVE (3)
- no ATP req. 2. movement of GLUCOSE into cells 3. BIGger particles cannot go through normal channels in the cell membrane so they make NEW channels
Osmosis- PASSIVE
- no ATP req. 2. movement of WATER in and out of cells
Osmosis moves from- PASSIVE
high concentration to low concentration
Osmosis terms- PASSIVE (3)
- Isotonic 2. Hypotonic 3. Hypertonic
Isotonic
or equilibrium- same solute on both sides
Hypotonic
GREATER solute concentration
cell will SHRINK, water ENTERS cell
Hypertonic
LESS solute concentration
cell will SWELL/BURST, water LEAVES cell
ACTIVE Membrane Transport (3)
- REQUIRES ATP 2. Low concentration to high concentration 3. Going AGAINST the gradient/ swimming upstream
ACTIVE membrane transport (3 main)
- Exocytosis 2. Endocytosis 3. Phagocytosis
Exocytosis
moves/allows a substance to LEAVE the cell
Endocytosis
enables LARGE particles to ENTER the cell