Term
| surface area _ volume ratio |
|
Definition
| relationship between surface area of an organism and its volume |
|
|
Term
| features of gas exchange surfaces |
|
Definition
large sa/volume ratio
thin
partially permeable |
|
|
Term
|
Definition
| rate of diffusion of a substance across a membrane is directly proportional to the surface are of the membrane and to the difference in concentration on each side |
|
|
Term
|
Definition
| movement of molecules or ions from where they are at high concentration to where they are at a lower concentration |
|
|
Term
|
Definition
| mechanism by which the air or water in contact with a gas exchange surface is changed |
|
|
Term
|
Definition
| pores by which gases enter and leave insect trachea |
|
|
Term
|
Definition
| a system by which two fluids flow in opposite directions increasing the efficiency with which substances are exchanged across them |
|
|
