Bio chapter 7 Deck 6 Slides 17- 20) Flashcards
Cell boundaries include cell ____s and cell_____s
Cell MEMBRANES and Cell WALLS
The job of the cell membrane is to ______ what enters and leaves the cell
This means it is selectively ______
Regulate
Selectively PERMEABLE
The cell membrane is a double - layered sheet called a ______
Lipid bilayer
Embedded in the lipid bilayer are ___S
Proteins
The proteins in the lipid bilayer form ___S and pumps to get things in and out of the cell
Channels
In the cell membrane carbohydrates are ___ed to some of the proteins
The carbohydrates act like CHEMICAL ID CARDS allowing cells to identify each other
ATTACHED
___ TRANSPORT is a way materials move through cell membranes that does NOT require energy
PASSIVE
There are three forms of PASSIVE TRANSPORT through the cell membrane:
- Diffusion
- Osmosis
- Facilitated diffusion
___Is the movement of a substance from an area of high concentration to an area of low concentration
DIFFUSION
Diffusion continues until a state of___ is reached (equal amounts of substance on each side of the cell membrane)
EQUILIBRIUM
___Is the diffusion of water across a membrane
Osmosis
In___ Solutions the same concentrations of water are on each side of the membrane
(“same strength“)
Isotonic
In___ Solutions there is a HIGH amount of solute, LOW amount of water (“above strength)
A CONCENTRATED solution
HYPERTONIC
In___ Solutions there is a low amount of solute, high amount of water. (“BELOW strength “)
A DILUTE solution
HYPOTONIC
Water always flows from a ___ solution ( MORE water) to a ___ solution ( LESS water) by osmosis until both solutions are ISO tonic (equal amounts of water)
Flows from a HYPOTONIC solution to a HYPERTONIC solution
