When protein membrane receptors are activated, what usually happens?
When protein membrane receptors are activated, what usually happens?
| The receptor changes conformation after binding with signal polypeptides. |
| The receptor preferentially binds with lipid or glycolipid signal molecules. |
| A change occurs on only one membrane surface: exterior or interior. |
| A change occurs in intracellular ion concentration. |
| The receptors open and close in response to protein signals. |