exocytosis
exocytosis
Exocytosis.
The process of expelling particles or liquids outside the cell membrane is called exocytosis. During exocytosis, membrane-bound vesicles inside the cell fuse with the cell membrane and release their contents outside the cell. This process is important for transporting molecules out of the cell and maintaining cellular homeostasis.
If there is the concentration of substance inside the cell is lesser than outside and cell membrane is permeable to the substance.
The process is called endocytosis, specifically phagocytosis if the large substance is solid or pinocytosis if it is liquid. The plasma membrane engulfs the substance, forming a vesicle, and brings it into the cell.
exocytosis
The cytoplasm surrounds the organelles in the plasma membrane. The cytoplasm is a gel-like substance composed of water, enzymes, salts, and various organic molecules. It fills the space inside the cell and provides a medium for chemical reactions to occur.
Diffusion across a cell membrane occurs when concentrations of a substance are higher either inside or outside the cell.
Surrounds the DNA to keep it safe inside
If substance A can diffuse across the membrane, it will move from an area of higher concentration to an area of lower concentration until equilibrium is reached. This means that the concentration of A inside the cell will increase while the concentration outside the cell will decrease, assuming that the initial concentration outside the cell is higher than inside. Eventually, the concentrations inside and outside the cell will become equal if no other factors interfere.
The thin structure that surrounds the cytoplasm of an animal cell is called as cell membrane. This is present in most plant, animal and fungi cells. It is a selectively permeable structure and allows the flow of ions and particles from the inside of the cell to the outside and vice-versa.
The barrier between the inside of a cell and its enviorment is a CELL MEMBRANE