Term
| name three functions of membrane proteins |
|
Definition
transportation
cell-to-cell signals
enzymatic activity |
|
|
Term
| the plasma membrane exhibits ________, allowing some substances to cross it more easily than others |
|
Definition
|
|
Term
| the diffusion of a substance across a biological membrane is ________ transport because it requires no energy from the cell to make it happen |
|
Definition
|
|
Term
| At warm temperatures, the steroid ________ restrains movement of phospholipids while at cool temperatures, it maintains fluidity by preventing tight packing |
|
Definition
|
|
Term
| Every energy transfer or transformation increases the ________, or disorder of the universe |
|
Definition
|
|
Term
| A ________ -tonic solution is one in which the solute concentration is greater than that inside the cell |
|
Definition
|
|
Term
| In ________, the end product of a metabolic pathway shuts down the pathway. This process prevents a cell from wasting chemical resources by synthesizing more product than is needed |
|
Definition
|
|
Term
| Energy can be transferred and transformed, but it cannot be ________ or ________ |
|
Definition
|
|
