Question

some molecules can cross the cell membrane without using cellular energy. this movement is called passive transport. other molecules need to use energy from the cell to move across the membrane. this movement is called active transport. select the true statements. cells must maintain a stable internal environment. some molecules require cellular energy to cross the cell membrane. the cell membrane prevents any molecules from exiting the cell. passive transport does not require energy from the cell.

Explanation:

• Cells maintain homeostasis, a stable internal environment.
• Active transport uses cellular energy for molecule - movement across the membrane.
• The cell membrane is semi - permeable, not completely impermeable to molecule exit.
• Passive transport occurs without using cellular energy.

Answer:

• Cells must maintain a stable internal environment.
• Some molecules require cellular energy to cross the cell membrane.
• Passive transport does not require energy from the cell.