The answer you are looking for is 'active transport'.
Here the cell moves the molecule into (or out of) the cell against the concentration gradient. This requires energy.
There are other energetic process such as endo- and exo-cytosis that the cell uses to move large molecules.
Yes, water can move through the middle of a membrane through a process called osmosis.
Cells can eject materials outside of the cell through a process called exocytosis. In exocytosis, vesicles containing the materials fuse with the cell membrane and release their contents outside of the cell. This process is important for the secretion of hormones, neurotransmitters, and other substances from the cell.
Passive transport is a non-energy requiring process that moves materials across a cell membrane with the concentration gradient. This process includes simple diffusion, facilitated diffusion, and osmosis.
The process of substances leaving a cell is called diffusion. The cell membrane is a selective permeable membrane that only allows certain materials to enter or leave the cell.
Diffusion.
permeability
This sort of membrane is said to be semipermeable.
Yes, water can move through the middle of a membrane through a process called osmosis.
permeability
permeability
diffusion
Cells can eject materials outside of the cell through a process called exocytosis. In exocytosis, vesicles containing the materials fuse with the cell membrane and release their contents outside of the cell. This process is important for the secretion of hormones, neurotransmitters, and other substances from the cell.
Energy-free movement of materials through a cell membrane is called passive transport. This process includes diffusion, osmosis, and facilitated diffusion, where molecules move from an area of high concentration to an area of low concentration without the input of energy.
Passive transport is a non-energy requiring process that moves materials across a cell membrane with the concentration gradient. This process includes simple diffusion, facilitated diffusion, and osmosis.
The only time a cell would be entering the plasma membrane would be with a white blood cell. The process is called phagocytosis, a form of endocytosis.
The process where the plasma membrane forms a pocket to bring in solid materials is called endocytosis. This involves the engulfment of particles by the membrane to create a vesicle inside the cell for further processing.
cell membrane