| 释义 |
plasma membrane
noun
1. : an external semipermeable limiting layer of cell protoplasm that is commonly regarded as an oriented protein gel rich in lipoids and calcium and that is a major factor in regulating exchanges between the cell and its environment — called also cell membrane, ectoplast; see cell wall
2. : a protoplasmic surface (as a tonoplast) regarded as similar in structure or function to the plasma membrane |