The cell membrane controls the passage of substances into and out of the cell. It is a selectively permeable barrier made up of a phospholipid bilayer with proteins embedded in it. It allows some material (such as steroid hormones) to pass straight through, while others (such as ions) need the assistance of a protein transporter, and some material cannot get in at all.
The cell membrane controls what enters and exits a cell.
The cell membrane controls the passage of substances into and out of the cell. It is a selectively permeable barrier made up of a phospholipid bilayer with proteins embedded in it. It allows some material (such as steroid hormones) to pass straight through, while others (such as ions) need the assistance of a protein transporter, and some material cannot get in at all.
the cell membrane
The cell membrane, also known as the plasma membrane, separates the intracellular material from the extracellular material. This selectively permeable barrier controls the passage of substances in and out of the cell, helping to maintain cellular homeostasis.
The cell membrane.
Cell membrane.
The nucleus controls the cells activities
the cell wall-offers protection to a cell -allow material passage
The plasma membrane controls the passage of nutrients into the cell and wastes out of the cell through a process called selective permeability. This involves transport proteins and channels that regulate the movement of molecules based on size, charge, and concentration gradients.
Epithelial
DNA
The nucleus of a cell contains the cell's genetic material, in the form of DNA, which controls the cell's activities and functions. It also contains the nucleolus, where ribosomal RNA is synthesized, and is surrounded by a nuclear envelope that helps regulate the passage of materials in and out of the nucleus.