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What substance in the cell membrane keeps it from breaking too easily?
Cholesterol is a substance in the cell membrane that helps stabilize and strengthen the membrane, preventing it from breaking too easily. It helps maintain the fluidity and integrity of the cell membrane.
Why does mitochondria have a double membrane structure?
Mitochondria have a double membrane structure because they are believed to have originated from a process called endosymbiosis, where a smaller prokaryotic cell was engulfed by a larger cell. The double membrane allows for compartmentalization of different functions within the mitochondria, such as the production of energy through cellular respiration.
What are the parts of a lysosome?
Lysosomes are membrane-bound organelles containing digestive enzymes. They consist of a lipid bilayer membrane that encloses the acidic interior where enzymes break down waste materials, cellular debris, and engulfed microbes. The lysosome's membrane also helps protect the cell from the enzymes within.
State one possible reason a certain substance can not pass across a cell membrane?
The cell membrane is selectively permeable. Some substances like molecules are too big to pass through the membrane. The membrane allows passive transport of moleculesÊ by filtration, diffusion, or osmosis.
Which theory tries to explain the origin of endoplasmic reticulum nuclear membrane?
The theory of endosymbiosis which believes that nuclear membranes and organelles such as the mitochondrian have evolved from a semi"mutation" in which a prokaryotic cell was engulfed by a eukaryotic cell and instead of being digested it survived and has evolved into key features of the eukaryotic cell. Evidence for this is the fact that the mitochondrian have their own ribosomes ( of which are the prokaryotic variety) and their own DNA which allow them to make their own proteins that can be used in synthesis of adenosine triphosphate (ATP)
How does a ameoba?
Its called phagocytosis. Two extensions of the membrane called pseudopods surround the object to be engulfed. It then becomes a vesicle inside the cell which can be digested by lysosomes.
How does a ameoba eats?
Its called phagocytosis. Two extensions of the membrane called pseudopods surround the object to be engulfed. It then becomes a vesicle inside the cell which can be digested by lysosomes.
What is phagocytosis and how does it work?
large particles or cells are engulfed by the cell plasma membrane
When a cell membrane actively surrounds a solid substance and forms a vesicle which moves into the cell this is called what?
This process is known as endocytosis, specifically phagocytosis if the solid substance being engulfed is a large particle or bacterium. Endocytosis involves the cell membrane wrapping around the substance to form a vesicle that is then internalized into the cell.
What process is when the plasma membrane forms a pocket that pinches inward?
That process is called endocytosis. It is a cellular process where the plasma membrane surrounds a substance to be brought into the cell, forming a vesicle that is then engulfed into the cell. There are different types of endocytosis, such as phagocytosis and pinocytosis.
When large molecules bind to receptors on the plasma membrane and are then engulfed by cell the process is called what?
Receptor-mediated endocytosis :)
The part of a foreign substance that is inserted into a macrophage membrane?
The part of a foreign substance that is insertde into a macrophage membrane?
What is a food vacuole?
A membrane-bound vacuole (as in an ameba) where ingested food is digested.
What is the process by which materials are engulfed by the cell membrane and brought into the cell?
The process by which materials are engulfed by the cell membrane and brought into the cell is called endocytosis. It involves the formation of vesicles that surround the material to be taken in and then fuse with the cell membrane to release the contents into the cell. There are two main types of endocytosis: phagocytosis, for larger solid particles, and pinocytosis, for smaller liquid particles.
What is a soft skin like structure that surrounds a cell and allows the cell to ingest digested food?
cell membrane or permeable membrane.
What transports substance in and out of cells?
Proteinscell membrane
If a substance is able to diffuse across a membrane then the membrane is said to be what?
selectively permeable
