The cell membrane surrounds all cells and controls movement of substances. It is selectively permeable, allowing some materials to enter or leave, while protecting and maintaining the cell’s internal environment.
Share
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
The cell membrane surrounds all cells and controls movement of substances. It is selectively permeable, allowing some materials to enter or leave, while protecting and maintaining the cell’s internal environment.
The cell membrane is a thin, flexible boundary present in all cells. It protects the cell and controls the movement of substances in and out. Being selectively permeable, it allows useful substances like nutrients and gases to pass while blocking harmful ones. It also helps cells communicate and interact with their surroundings.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/