Cell Membrane 1
The plasma membrane is made up primarily of a bilayer of
phospholipids
Form pathways across the membrane for specific proteins.
channel proteins in the cell membrane
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are the third major component of plasma membranes.
Carbohydrates
It is a passive process of transport. It is the movement of water through a semipermeable membrane according to the concentration gradient of water across the membrane.
Osmosis
Outside of cell has same solute as inside of the cell
Isotonic
Inside of cell has higher solute than outside of cell therefore water enters the cell.
hypotonic solution
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What transport requires energy?
Active Transport
It is the movement of large particles into cells (vesicle formation).
Endocytosis Transport
is a naturally occurring phenomenon and does not require the cell to exert any of its energy to accomplish the movement.
Passive transport
refers to a membrane’s ability to allow certain molecules or ions to pass through while blocking others.
Selective permeability
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It is the number of molecules in a given unit of volume.
Concentration
It is the difference between two regions of space such that molecules move from one region to the other.
Gradient
It is the movement of molecules from an area of high to an area of low concentration gradient.
Diffusion
Movement of large particles out of cells
Exocytosis
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The phospholipid bilayer that forms the inner layer
Hydrophobic tail
This phospholipid layer forms the outer border.
Hydrophilic head
describes the structure of the plasma membrane as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates
The fluid mosaic model
The fluid mosaic model of the plasma membrane structure describes the plasma membrane as a fluid combination of
phospholipids, cholesterol, proteins, and carbohydrates.
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It is the energy that drives and support many processes in living cells.
ATP (Adenosine Triphosphate)
It is the thin barrier that separates the inside of a cell from the outside environment.
Plasma Membrane/Cell Membrane