Term
|
Definition
| composed of lipid and proteins, the primary lipid in a cellular membrane is a phospolipid |
|
|
Term
|
Definition
| found on the surface of either side of the membrane, easily removed |
|
|
Term
|
Definition
| extend throughout the bilayer from one side to the other, not easily removed. |
|
|
Term
|
Definition
reception of signals
bind specifi molecules
used for transport of substances across the bilayer
catalyze reactions
help bring cells of the same type together
helps rejection of some cells |
|
|
Term
|
Definition
| individual proteins are more dispersed and not in sheets. |
|
|
Term
|
Definition
the number of molecules in a given amount of space
(molecules tend to move down their concentration gradients) |
|
|
Term
|
Definition
| random movement of molecules down the gradiant until they reach and equilibruim |
|
|
Term
| diffusion rate depends on 3 things |
|
Definition
1. concentration gratiant, steeper the gradiant the faster the movement
2. temperature, the highter the temperature the faster the rate.
3. Molecular size- the smaller the molecule the faster the diffusion. |
|
|
Term
|
Definition
| is the diffusion of water across a differentially permeable membrane |
|
|
Term
|
Definition
| the concentration of the solutes inside the cell, relative to those outside the cell |
|
|
Term
|
Definition
| when the cell shrivels up due to the movement across the membrane |
|
|
Term
|
Definition
| when the cell bursts from the movement across the membranes |
|
|
Term
|
Definition
| pressure made by H2O on the cell walls of plants |
|
|
Term
|
Definition
| allow plants to loose water, but are also used to take in C02 and let out O2 |
|
|
Term
|
Definition
| the act of releasing water through the stomata |
|
|
Term
|
Definition
| requires a membrane transport protein, but it is going down the gradient, no energy is needed.supplies cells with raw materials for nutrition and gets rid of wastes. |
|
|
Term
|
Definition
| needs the membrane transport protein and ATP, because typically moves things against the gradient. supplies cells with raw materials for nutrition and gets rid of wastes. |
|
|
Term
|
Definition
process by which substances are moved out of the cell
- a membrane is formed around junk( this is called a vesicle) the vesicle fuses to the cell membrane then can leave the cell |
|
|
Term
|
Definition
| process by which substances are brought into the cell. cell mmbrane forms around the particles and then passes into the cell (vacule) |
|
|
Term
|
Definition
phagocytosis- eating cells.. large molecules
pinocytosis- to drink cells.. small disolved particles
receptar mediated- lock and key method. |
|
|
Term
|
Definition
| is the capacity to do work, it produces a change in the state or motion of matter |
|
|
Term
|
Definition
| is stored energy that has the capacity to do work due to its position or state |
|
|
Term
|
Definition
|
|
Term
|
Definition
| is the study of energy and its transformation |
|
|
Term
| law of conservation of energy |
|
Definition
| states that the energy of the universe is constant, can be transferd and changed in form but can not be created or destroyed, as the transformations occur energy is convertated to heat( some organsims give off light) |
|
|
Term
| second law of thermodynamics(entropy) |
|
Definition
| the entropy of the universe is constantly increasing, entropy is the random movement of energy that cannot do work. (total amount of energy able to do work is decreasing) |
|
|
Term
|
Definition
| involve the breaking and formation of bonds, takes energy to make bonds and when the bonds are brojen the same amount of energy is released. |
|
|
Term
|
Definition
| fussion of water (passive) |
|
|
Term
|
Definition
| the act of releasing water through the stomata |
|
|
Term
|
Definition
| are regulatrs of chemical reactions and they function at speeding up chemical reacions by deacreasing the amount of energy needed to drive them. |
|
|
