細胞膜

1. Origins, structure, and basic meaning

• Structure: 細胞膜 (さいぼうまく) is a biological compound noun for the thin membrane separating a cell’s interior and exterior and regulating transport.
• Basic usage: 細胞膜の働きを学ぶ makes membrane function the lesson topic, while 細胞膜は内側と外側を隔てる states the structure’s general separating role.

2. Common pitfalls and similar expressions

• Learned function and boundary role
  • 細胞膜の働き can include several functions, while 細胞膜は隔てる states its boundary role. The membrane should not be equated with a cell wall.