Cell Membrane Cell Membrane Location the cell Function

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Cell Membrane

Cell Membrane

Cell Membrane? Location? ________ the cell Function? 1. ________ and _____ for the cell

Cell Membrane? Location? ________ the cell Function? 1. ________ and _____ for the cell 2. Regulation of what ____ and _____ the cell WHY? -Essential in order to maintain *homeostasis within the cell *maintaining _____ internal conditions

Composition of Cell Membrane Phospholipid Bilayer 1. ________: § § Hydrophilic Head; “water-_____” Hydrophobic

Composition of Cell Membrane Phospholipid Bilayer 1. ________: § § Hydrophilic Head; “water-_____” Hydrophobic Tail; “water-_____” 2. Bilayer § _______-layers (of phospholipids)

Composition of Cell Membrane ______ embedded throughout phospholipid bilayer Integral Proteins: ______ the width

Composition of Cell Membrane ______ embedded throughout phospholipid bilayer Integral Proteins: ______ the width of the cell membrane ______ Proteins: Located on one side of the cell membrane (or on the ‘periphery’) A variety of different ____ of proteins within the cell membrane, each with different ______

Composition _______: another lipid that maintains the _______ stability of the cell membrane Carbohydrates:

Composition _______: another lipid that maintains the _______ stability of the cell membrane Carbohydrates: allow for cell-tocell _______; a “fingerprint” for each cell Allows for the immune system to recognize ‘foreign’ cells and attack them Attached to proteins or phospholipids on _____ layer of cell membrane

Fluid Mosaic Model Break it down: FLUID: The cell membrane is ______ due to

Fluid Mosaic Model Break it down: FLUID: The cell membrane is ______ due to the lipid “tails” on its interior; they “wiggle” This means that the cell membrane is pliable The cell membrane has the consistency of olive oil at body temp. MOSAIC: _________ of different types, ________ positioned throughout the membrane create a “mosaic” appearance The cell membrane is a constantly moving assemblage of parts.

Cell Membrane Function Transport of molecules from one side of the membrane to the

Cell Membrane Function Transport of molecules from one side of the membrane to the other in order to maintain homeostasis within the cell. _______ Permeable: Only _____ substances can move across the membrane while others cannot. _____, non-charged molecules (H 20, CO 2, etc. ) can ____ cross the cell membrane. This is referred to as Passive Transport: molecules are ‘freely’ or ‘passively’ traveling through the cell membrane This occurs through one of two ways: ______ or ______ diffusion

Passive Transport: Diffusion No ______ is required Diffusion: the movement of molecules from a

Passive Transport: Diffusion No ______ is required Diffusion: the movement of molecules from a _____ concentration to a _____ concentration until equilibrium is reached Concentration: the amount of solute in the solvent ______: dissolved substance (in the solvent) solvent: the liquid containing the dissolved substance Equilibrium: occurs when the _____ concentration is the same throughout the system; ______ on both sides of the membrane

Passive Transport: Facilitated Diffusion A form of Passive Transport (so no _____ required) Facilitated

Passive Transport: Facilitated Diffusion A form of Passive Transport (so no _____ required) Facilitated Diffusion: ______ molecules (that are unable to passively cross the cell membrane) are “carried” through via a channel protein. Specific protein channels carry specific types of molecules For example: _____ is transported across the cell membrane via facilitated diffusion