Cell membrane!!
Cell membrane
The cell membrane helps a cell maintain homoeostasis by regulating the movement of substances in and out of the cell. The cell membrane is a lipid bilayer which is selectively permeable to substances.
Exocytosis!! :)
Transport proteins
Active transport is when a cell needs to use energy in or to let substances pass in through or out or its cell membrane or cell wall. Passive transport requires to energy at all making substances like water easy to let pass through.
The cell membrane
Cell membrane
cell membrane
The cell membrane helps a cell maintain homoeostasis by regulating the movement of substances in and out of the cell. The cell membrane is a lipid bilayer which is selectively permeable to substances.
Vesicular active transport
Exocytosis!! :)
Do you mean how do substances move through a cell membrane if they are too big to transport by passive transport?If so, a cell uses active transport to move large particles in and out of a cell. Active transport includes endocytosis, pinocytosis, and phagocytosis.
lysosomes
VesiclesCell walls are the small structure. This is what transports the substances.
Vesicular active transport
Vesicular active transport
Transport proteins