Biology; Membrane Transport
Terms in this set (58)
The amount of water and the size of the cell will stay the same
Water will move out of the cell
the cell will swell (water entering the cell)
When large molecules can't cross the plasma membrane, and are "helped" across by carrier proteins
Diffusion and osmosis are both types of
no energy is required for the molecules to move into or out of the cell.
the process by which molecules spread from areas of high concentration, to areas of low concentration
When the molecules are even throughout a space
a difference between concentrations in a space
If you are moving from high concentration to low concentration, molecules are moving _____the gradient
-forming a vesicle
The energy comes in the form of ____________
When ATP is used up it becomes __________
ATP becomes ADP
-The cellular process by which cells excrete waste products or chemical transmitters
What is the cell membrane made of?
Phospholipids, carb chains, lipid cholesterol
phosphate group head (hydrophilic) and two fatty acid tails (hydrophobic)
The cell membrane allows some materials to cross and keeps others out
non polar tail
Diagram of hypertonic, isotonic, hypotonic
hyper-water will exit
iso-will stay the same
hypo-water enters cell
-does not require energy
In this type of diffusion the molecule is too large to pass across, so it needs the help of a carrier protein. What type of diffusion is this?
-does not require energy
-molecules are moving down the concentration gradient
-this is active transport
When a P is added to ADP what is created?
When a P is removed what is created?
Which has more energy ATP or ADP?
How do we get the energy to make ADP into ATP?
the energy comes from food
What process creates ATP?
cellular respiration creates ATP
What process creates ADP?
using energy from ATP creates ADP
loving or attracting water
fail to mix with water
functions of chloesterol
-helps strengthen plasma membrane
-keeps tails of phospholipids separated or non polar
functions of proteins
-transport substances into and out of cell that are unable to pass through bilayer
-a collage of proteins and other materials embedded in the fluid matrix of the lipid bilayer
-determine membranes specific function
-embedded in surface of bilayer with H bonds
how are materials transported across the cell membrane?
Molecules will move across difference in space called a concentration gradient
Molecules tend to move from high concentration to low until equilibrium is reached
What happened when equilibrium is reached?
The solute or particles will move equally into and out of the membrane
What is passive transport?
-no energy required
-high to low concentration
-move down concentration gradient
What are the types of passive transport?
Diffusion, facilitated diffusion, osmosis
-The movement of particles from high to low without energy until equilibrium reach
Particles move through a carrier protein down their concentration gradient until equilibrium is reached. Nonwater
Cells stay the same
What is active transport?
Requires energy (ATP nucleic acid)
Low to high
Agaisnt concentration gradients
Types of active transport?
Sodium Potassium pump
Sodium potassium pump
moves 3 Na+ out and 2K+ in
Energy from ATP
low to high
Uses membrane protein called pumps to move molecule
How are vesicles used to transport material out of the cell?
Vesicles are small membrane sacs pinch off of cell membranes used by cells for transporting molecules
2 kinds of endocytosis
membrane protein complexes and their function is to facilitate the diffusion of ions across biological membranes.
cell to cell recognition
polysaccharide can cause immune response
What type of transport does not require ATP?
Molecules that can diffuse across the membrane include
Many nonpolar molecules
The diffusion of water through a selectively permeable membrane is called
Active transport is the movement of a substance from....
An area of low concentration to an area of higher concentration
When particles move out of the cell through facilitated diffusion the cell...
Does not require energy
Molecules that are too large to be moved through the cell membrane can be transported out of the cell by
Diagram of transport
B facilitated diffusion
C Requires energy, active transport
D hydrophobic region, fatty acid tails
E phospholipid heads