Study sets matching "membrane structure and function"

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Study sets matching "membrane structure and function"

49 terms
Membrane structure and Function
Plasma Membrane
Phospholipids
amphipathic molecules
Fluid mosaic model
1. is the boundary that separates the living cell from its su…
1. are the most abundant lipid in the Plasma membrane... 2. Are…
containing hydrophobic and hydrophilic regions
states that a membrane is a fluid structure with a "mosaic" o…
Plasma Membrane
1. is the boundary that separates the living cell from its su…
Phospholipids
1. are the most abundant lipid in the Plasma membrane... 2. Are…
10 terms
Cell Membrane Structure and Function
Cell Membrane
Phospholipids
Selectively Permeable
Hydrophilic
Decides what can enter or leave the cell.
Lipids (fats) that make up the cell membrane. They have a pol…
Allows certain things to pass through and prevents other thin…
Will mix with water; polar phospholipid heads
Cell Membrane
Decides what can enter or leave the cell.
Phospholipids
Lipids (fats) that make up the cell membrane. They have a pol…
Cell Membrane structure and function
Phospholipid
Phospholipid bilayer
Membrane proteins
Selectively Permeable
molecule that has a hydrophillic "head", and two hydrophobic,…
arrangements of phospholipids that makes up a plasma membrane
various kinds of these are embedded in the cell membrane and…
Cell membranes let small, non-polar molecules diffuse through…
Phospholipid
molecule that has a hydrophillic "head", and two hydrophobic,…
Phospholipid bilayer
arrangements of phospholipids that makes up a plasma membrane
20 terms
Cell Membrane structure and function
Phospholipid
Phospholipid bilayer
Membrane proteins
Selectively Permeable
molecule that has a hydrophillic "head", and two hydrophobic,…
a double layer of phospholipids that makes up a plasma membrane
various kinds of these are embedded in the cell membrane and…
Cell membranes let small, non-polar molecules diffuse through…
Phospholipid
molecule that has a hydrophillic "head", and two hydrophobic,…
Phospholipid bilayer
a double layer of phospholipids that makes up a plasma membrane
Plasma Membrane Structure & Function
Bulk Transport
Phagocytosis
Pinocytosis
Receptor Mediated Endocytosis
Active transport - use energy in AT. Transport of cellular pr…
Cell eating
Cell drinking
Iron-transfer - receptors - brings in
Bulk Transport
Active transport - use energy in AT. Transport of cellular pr…
Phagocytosis
Cell eating
31 terms
Membrane Structure & Function
Cell membrane
Plasma membrane
Semi-permeable
Permeable
semi-permeable organelle that controls the passage (transport…
another name for cell membrane
only some things can pass (move across
can pass (move) across
Cell membrane
semi-permeable organelle that controls the passage (transport…
Plasma membrane
another name for cell membrane
Cell Membrane structure and function
Phospholipid
Phospholipid bilayer
Membrane proteins
Selectively Permeable
molecule that has a hydrophillic "head", and two hydrophobic,…
a double layer of phospholipids that makes up a plasma (cell)…
various kinds of these are embedded in the cell membrane and…
Cell membranes let small, non-polar molecules diffuse through…
Phospholipid
molecule that has a hydrophillic "head", and two hydrophobic,…
Phospholipid bilayer
a double layer of phospholipids that makes up a plasma (cell)…
32 terms
Membrane structure and function
Selective permeability
amphipathic
fluid mosaic model
Integral proteins
A property of a plasma membrane that allows some substances t…
A molecule that has both a hydrophilic region and a hydrophob…
Structural model of the plasma membrane where molecules are f…
proteins implanted within lipid bilayer of plasma membrane
Selective permeability
A property of a plasma membrane that allows some substances t…
amphipathic
A molecule that has both a hydrophilic region and a hydrophob…
9 terms
Cell Membrane Structure and Function
Cell Membrane
Phospholipids
Selectively Permeable
Hydrophilic
Decides what can enter or leave the cell.
Lipids (fats) that make up the cell membrane. They have a pol…
Allows certain things to pass through and prevents other thin…
Will mix with water; polar phospholipid heads
Cell Membrane
Decides what can enter or leave the cell.
Phospholipids
Lipids (fats) that make up the cell membrane. They have a pol…
14 terms
Membrane Structure and Function
Amphipathic molecule
What are the components of a phospholi…
Why are phospholipids amphipathic mole…
Describe the fluid mosaic model of cel…
molecules containing hydrophobic and hydrophilic regions
a glycerol molecule, two fatty acids and a phosphate group, m…
They are both hydrophilic and hydrophobic on the bilayer, due…
Various proteins are attached in a bilayer of amphipathic pho…
Amphipathic molecule
molecules containing hydrophobic and hydrophilic regions
What are the components of a phospholi…
a glycerol molecule, two fatty acids and a phosphate group, m…
Cell and Membrane Structure and Function
What are three characteristics of the…
Selective Permeability
What are some difference between activ…
Diffusion
1. Membrane doesn't break apart ... 2. Components may move later…
Tendency of cells membrane to allow some substances to cross…
Active Transport:... - Requires the use of ATP (energy)... - Transp…
Movement of a substance from a high concentration level to a…
What are three characteristics of the…
1. Membrane doesn't break apart ... 2. Components may move later…
Selective Permeability
Tendency of cells membrane to allow some substances to cross…
Cell Membrane Structure and Function
Cell Membrane
Phospholipids
Selectively Permeable
Hydrophilic
Decides what can enter or leave the cell.
Lipids (fats) that make up the cell membrane. They have a pol…
Allows certain things to pass through and prevents other thin…
Will mix with water; polar phospholipid heads
Cell Membrane
Decides what can enter or leave the cell.
Phospholipids
Lipids (fats) that make up the cell membrane. They have a pol…
20 terms
Cell Membrane Structure and Function
Cell Membrane
Phospholipid
Phospholipid Bilayer
Semi-Permeable
The semipermeable membrane surrounding the cytoplasm of a cel…
Molecule that forms the bilayer of the cell's membranes; has…
Two layers of phospholipids, with a hydrophobic inside and a…
Allowing certain substances to pass through but not others
Cell Membrane
The semipermeable membrane surrounding the cytoplasm of a cel…
Phospholipid
Molecule that forms the bilayer of the cell's membranes; has…
Cell Membrane Structure and Function
Cell Membrane
Phospholipids
Selectively Permeable
Hydrophilic
Decides what can enter or leave the cell.
Lipids (fats) that make up the cell membrane. They have a pol…
Allows certain things to pass through and prevents other thin…
Will mix with water; polar phospholipid heads
Cell Membrane
Decides what can enter or leave the cell.
Phospholipids
Lipids (fats) that make up the cell membrane. They have a pol…
10 terms
Cell Membrane Structure & Function
Cell Membrane
Passive Transport
Diffusion
Concentration
outer covering of a cell, made up of a double layer of lipids…
Movement of molecules across the cell membrane without the us…
the movement of molecules from an area of greater concentrati…
the amount of a substance in a given area
Cell Membrane
outer covering of a cell, made up of a double layer of lipids…
Passive Transport
Movement of molecules across the cell membrane without the us…
21 terms
Cell Membrane Structure and Function
An invisible surface layer that surrou…
Molecules that have both polar (hydrop…
The movement of solvents across semi-p…
The movement of a cell through it's en…
Plasma membrane
Amphipathic (amphiphilic)
Osmosis
Phototaxis
An invisible surface layer that surrou…
Plasma membrane
Molecules that have both polar (hydrop…
Amphipathic (amphiphilic)
Membrane Structure and Function
What makes up a plasma membrane struct…
What is a phospholipid? Be descriptive…
What molecule(s) helps to "stiffen" th…
What's the difference between integral…
A lipid bilayer with non-polar hydrophobic tails and polar hy…
It's what makes up the plasma membrane. It is a structure wit…
Cholesterol
Integral proteins (d) are embedded in membrane and often func…
What makes up a plasma membrane struct…
A lipid bilayer with non-polar hydrophobic tails and polar hy…
What is a phospholipid? Be descriptive…
It's what makes up the plasma membrane. It is a structure wit…
24 terms
Cell Membrane Structure and Function
Mixture
Homogeneous Mixture
Heterogeneous Mixture
Solution
a combination of two or more substances in which each substan…
a mixture that has the same composition throughout. Example:…
a mixture that does not have the same composition throughout.…
another name for a homogeneous mixture
Mixture
a combination of two or more substances in which each substan…
Homogeneous Mixture
a mixture that has the same composition throughout. Example:…
53 terms
*Cell Membrane Structure and Function
An invisible surface layer that surrou…
The movement of solvents across semi-p…
The movement of a cell through it's en…
A type of regulatory mechanism allowin…
Plasma membrane or cell membrane
Osmosis
Phototaxis
Quorum sensing
An invisible surface layer that surrou…
Plasma membrane or cell membrane
The movement of solvents across semi-p…
Osmosis
9 terms
Membrane Structure & Function
Hydrophobic interactions
Fluid Mosaic Model
Integral membrane proteins
Four functions of membrane proteins
are responsible for holding lipid bilayers together.
Membranes are composed of about 50% protein embedded into the…
completely span the lipid bilayer one or more times.... - in alp…
- Transport... - Enzymatic Activity... - Signaling... - Cell to cell r…
Hydrophobic interactions
are responsible for holding lipid bilayers together.
Fluid Mosaic Model
Membranes are composed of about 50% protein embedded into the…
13 terms
Cell Membrane Structure and Function
Cell Membrane
Phospholipids
Selectively Permeable
Hydrophilic
Decides what can enter or leave the cell.
Lipids (fats) that make up the cell membrane. They have a pol…
Allows certain things to pass through and prevents other thin…
Will mix with water; water loving
Cell Membrane
Decides what can enter or leave the cell.
Phospholipids
Lipids (fats) that make up the cell membrane. They have a pol…
Cells-Membrane Structure and Function
Plasma membrane
Three major functions of plasma membrane
The membrane function is dependent on…
Phospholipid bilayer
A thin membrane that surrounds each cell. Act as a gatekeeper
1.Selectively isolates (seperates) the cell's internal from e…
Membrane structure.
one polar hydrophillic head (loves water)... two non-polar hydro…
Plasma membrane
A thin membrane that surrounds each cell. Act as a gatekeeper
Three major functions of plasma membrane
1.Selectively isolates (seperates) the cell's internal from e…
Plasma Membrane Structure & Function
Glycoprotein
Carbohydrate
Glycolipid
Integral Protein
Cell to cell interactions E.g. Immune reaction, hormone-cell,…
Provides energy and is the bodies main source of fuel for phy…
Cell to cell recognition, protects membrane from harsh extrac…
Transports (actively) substances across the membrane, cell to…
Glycoprotein
Cell to cell interactions E.g. Immune reaction, hormone-cell,…
Carbohydrate
Provides energy and is the bodies main source of fuel for phy…
39 terms
Membrane Structure and Function POGIL
How many different types of molecules…
Number of triangles and circles on eac…
Which shape is larger?
Describe direction of movement of mole…
two: circle and triangle
14 triangles on left: 0 triangles on right... 12 circles on left…
triangle
Random-all directions
How many different types of molecules…
two: circle and triangle
Number of triangles and circles on eac…
14 triangles on left: 0 triangles on right... 12 circles on left…
34 terms
membrane structure and function
Describe the fluid mosaic structure of…
list four functions of membrane proteins
Explain how membranes exhibit selectiv…
Explain how the structure of phospholi…
it's basically the environment of the membrane. It's a phosph…
1. transport (protein channels), ... 2. cell to cell recognition…
allows some molecules to pass easier than others
membrane is a phopholipid bilayer, aka the head of a phosphol…
Describe the fluid mosaic structure of…
it's basically the environment of the membrane. It's a phosph…
list four functions of membrane proteins
1. transport (protein channels), ... 2. cell to cell recognition…
9 terms
Membrane Structure and Function
selective permeability
fluid mosaic model
integral protein
peripheral protein
a property of biological membranes that allows them to regula…
the currently accepted model of cell membrane structure, whic…
a transmembrane protein with hydrophobic regions that extend…
a protein loosely bound to surface of a membrane or to part o…
selective permeability
a property of biological membranes that allows them to regula…
fluid mosaic model
the currently accepted model of cell membrane structure, whic…
Membrane structure and function
lipid bilayer
fluid-mosaic model
Integral proteins
Peripheral proteins
flexible double-layered sheet that makes up the cell membrane…
Model describing the cell membrane as a dynamic structure wit…
proteins that penetrate the lipid bilayer. They are transmemb…
proteins located outside the lipid bilayer on either side; as…
lipid bilayer
flexible double-layered sheet that makes up the cell membrane…
fluid-mosaic model
Model describing the cell membrane as a dynamic structure wit…
55 terms
Membrane Structure and Function
selective permeability
fluid mosaic model
integral protein
peripheral protein
a property of biological membranes that allows them to regula…
the currently accepted model of cell membrane structure, whic…
a transmembrane protein with hydrophobic regions that extend…
a protein loosely bound to surface of a membrane or to part o…
selective permeability
a property of biological membranes that allows them to regula…
fluid mosaic model
the currently accepted model of cell membrane structure, whic…
37 terms
Membrane Structure & Function
Active transport
Amphipathic molecule
Aquaporin
Concentration gradient
Uses energy from ATP to move molecules... against concentration…
A molecule with both hydrophilic and hydrophobic regions
Water channel proteins that facilitates the diffusion of mass…
An increase or decrease in the density of a solute in an area.
Active transport
Uses energy from ATP to move molecules... against concentration…
Amphipathic molecule
A molecule with both hydrophilic and hydrophobic regions
37 terms
Membrane Structure and Function
Plasma Membrane Structures
Fluid Mosaci structure
Cholesterol
Proteins
Phosolipids have hydrophobic and hydrophilic region... Cholester…
lipid bilayer
flat plane molecule which stiffens the plasma membrane
Integral- embedded in membrane often function as channels ... Pe…
Plasma Membrane Structures
Phosolipids have hydrophobic and hydrophilic region... Cholester…
Fluid Mosaci structure
lipid bilayer
Membrane structure and function
plasma membrane
phospholipids
cholesterol
fluid mosaic model
controls the entry and exit of molecules through the cell
polar head. non polar tails. line the membrane
in animal cells. makes membranes stiff and strong. plants lac…
membrane is a mosaic of lipids and different proteins
plasma membrane
controls the entry and exit of molecules through the cell
phospholipids
polar head. non polar tails. line the membrane
Membrane Structure and Function
Transport Membrane
Enzymatic Activity
Signal Transduction
Cell-Cell Recognition
• left: a protein that spans the membrane may provide a hydro…
a protein built into the membrane may be an enzyme with its a…
a membrane protein (receptor) may have a binding site with a…
some glycoproteins serve as identification tags that are spec…
Transport Membrane
• left: a protein that spans the membrane may provide a hydro…
Enzymatic Activity
a protein built into the membrane may be an enzyme with its a…
7 terms
Membrane Structure and Function
Archaebaterial ether lipids:... monolayer…
Membrane Lipids are of 3 main types; P…
amino group is linking to the fatty ac…
Glycolipids are sugar-containing lipid…
Archaebaterial ether lipids:... monolayer…
Membrane Lipids are of 3 main types; P…
51 terms
MEMBRANE STRUCTURE AND FUNCTION
Plasma Membrane
Molecules that cannot move freely cros…
Passive Transport
Diffusion
a fluid bi layer of phospholipids that regulate permeability…
-Charged molecules... -LARGE Molecules... -Non-charged molecules
carry, small non-charged molecules across lipid bi layer from…
slow, passive movement.
Plasma Membrane
a fluid bi layer of phospholipids that regulate permeability…
Molecules that cannot move freely cros…
-Charged molecules... -LARGE Molecules... -Non-charged molecules
21 terms
Membrane structure and Function
Selective Permeability
What are the stable ingredient's of me…
amphipathic
fluid mosaic model
the plasma membrane allows some substance to cross it more ea…
Lipids and Proteins
A molecule that has both a hydrophilic region and a hydrophob…
The currently accepted model of cell membrane structure, whic…
Selective Permeability
the plasma membrane allows some substance to cross it more ea…
What are the stable ingredient's of me…
Lipids and Proteins
26 terms
Membrane Structure and Function
extracellular matrix
cholesterol
amphipathic
why is a membrane said to be a mosaic
made of glycoproteins (collagen)... function is structure
steroid... decreases the fluidity of membrane
having 2 different affinities
it is made up of lots of bits/pieces
extracellular matrix
made of glycoproteins (collagen)... function is structure
cholesterol
steroid... decreases the fluidity of membrane
23 terms
membrane structure and function
What is the role of Cholesterol?
Channel Proteins
Carrier Proteins
Cell Recognition Proteins
Stiffens and strengthens the membrane, therefore regulating f…
Involved in the passage of molecules through the membrane. Th…
Involved in the passage of molecules through the membrane. Th…
Glycoproteins that help the body recognize when it is being i…
What is the role of Cholesterol?
Stiffens and strengthens the membrane, therefore regulating f…
Channel Proteins
Involved in the passage of molecules through the membrane. Th…
Membrane structure and function
How do transport proteins facilitate d…
Subtype of facilitated diffustion
The inside of the cell is more ____ an…
Types of passive transport
Either conformation change or gated channels
diffusion through ion channels
negative; positive (they want to go down their concentration…
osmosis, facilitated diffusion, diffusion through ion channels
How do transport proteins facilitate d…
Either conformation change or gated channels
Subtype of facilitated diffustion
diffusion through ion channels
34 terms
Membrane Structure and Function
Plasma membrane
Integral membrane proteins
Peripheral membrane proteins
Glycolipid
-Has a fluid mosaic structure... *Flexible and movable... *Made u…
-Protein that is fully-embedded in a membrane... -Function as ch…
-Internal or external proteins of a membrane... *Stick out of e…
-A carbohydrate that is attached to a lipid... *Is polar and no…
Plasma membrane
-Has a fluid mosaic structure... *Flexible and movable... *Made u…
Integral membrane proteins
-Protein that is fully-embedded in a membrane... -Function as ch…
10 terms
Biology-Membrane Structure and Function
Phospholipid bilayer
Passive Transport
Concentration Gradient
Equilibrium
2 layers of phosphate group
Selectively permeable membrane that helps maintain homeostasi…
A difference in the concentration of a substance
Concentration of a substance is equal throughout the space
Phospholipid bilayer
2 layers of phosphate group
Passive Transport
Selectively permeable membrane that helps maintain homeostasi…
28 terms
Cell Membrane Structure and Function
Plasma Membrane
Integral (transmembrane proteins)
Phospholipid Bilayer
Peripheral Proteins
Somewhat flexible boundary separating the living cells from n…
Extend through the hydrophilic and hydrophobic regions of the…
Major component of the cell membrane, 2 layers of amphipathic…
Loosely attached to the surface of the membrane sometimes out…
Plasma Membrane
Somewhat flexible boundary separating the living cells from n…
Integral (transmembrane proteins)
Extend through the hydrophilic and hydrophobic regions of the…
36 terms
Cell Membrane Structure and Function
Passive Transport
Active Transport
Cotransport
Bulk Movement
the diffusion of a molecule across a biological membrane; no…
the movement of molecules across the membrane against a conce…
process where single ATP-powered pump actively transports one…
transport of large substances across the cell membrane
Passive Transport
the diffusion of a molecule across a biological membrane; no…
Active Transport
the movement of molecules across the membrane against a conce…
Cell Membrane Structure and Function
Charles Overton
Irving Langmuir
Gorter and Grendel
Davson and Danielli
membrane is composed of lipids bc he saw that substances diss…
created artificial membranes made of phospholipids
RBC membrane consists of phospholipid layer
- single layer of proteins covering lipid bilayer... - cells hav…
Charles Overton
membrane is composed of lipids bc he saw that substances diss…
Irving Langmuir
created artificial membranes made of phospholipids
Cell Membrane structure and function
Phospholipid
Phospholipid bilayer
Membrane proteins
Selectively Permeable
molecule that has a hydrophillic "head", and two hydrophobic,…
a double layer of phospholipids that makes up a plasma membrane
various kinds of these are embedded in the cell membrane and…
Cell membranes let small, non-polar molecules diffuse through…
Phospholipid
molecule that has a hydrophillic "head", and two hydrophobic,…
Phospholipid bilayer
a double layer of phospholipids that makes up a plasma membrane
Membrane Structure and Function
Diffusion
Phospholipid
Concentration Gradient
Facilitated Diffusion
movement of particles across a membrane from an area of high…
major component of a bi-layer plasma membrane
when there is a difference in concentration of a particular p…
movement of a particle along a concentration gradient (down)…
Diffusion
movement of particles across a membrane from an area of high…
Phospholipid
major component of a bi-layer plasma membrane
75 terms
Plasma Membrane Structure and Function
Membrane Functions
the most energetically favored orienta…
Lipid composition can influence the __…
The ____ of bilayers to form a continu…
1 .Compartmentalization... 2. Scaffold for biochemical activitie…
aqueous compartmenets
activity ; physical state
cohesion; deformable; fusion
Membrane Functions
1 .Compartmentalization... 2. Scaffold for biochemical activitie…
the most energetically favored orienta…
aqueous compartmenets
40 terms
Membrane Structure and Function
selective permeability
amphipathic
fluid mosaic model
integral protein
property of the plasma membrane that allows some substances t…
a molecule having both a hydrophilic region and a hydrophobic…
describes how a plasma membrane is a fluid structure with a v…
a transmembrane protein that penetrates the hydrophobic core…
selective permeability
property of the plasma membrane that allows some substances t…
amphipathic
a molecule having both a hydrophilic region and a hydrophobic…
28 terms
Cell Membrane Structure and Function
Selectively permeable
Fluid Mosaic Model
Sandwich Model
Freeze Fracture method
Plasma membrane... Allows some substances to pass more easily th…
Membrane held together by weak interactions... Phospholipids, pr…
Phospholipid bilayer between two protein layers... Problems: var…
Revealed the structure of the membrane's interior
Selectively permeable
Plasma membrane... Allows some substances to pass more easily th…
Fluid Mosaic Model
Membrane held together by weak interactions... Phospholipids, pr…
25 terms
cell membrane structure and function
Phospholipid bilayer
Fluid mosaic
Integral proteins
Glycolipid
Phospholipids with hydrophilic heads facing out and hydrophob…
Phospholipid bilayer stuffed with proteins and cholesterol
Embedded proteins that can protrude from one or both sides, c…
Carbohydrate chain attached to phospholipid bilayer
Phospholipid bilayer
Phospholipids with hydrophilic heads facing out and hydrophob…
Fluid mosaic
Phospholipid bilayer stuffed with proteins and cholesterol
34 terms
Cell Membrane: Structure and Function
Cell Membrane
selectively permeable
Fluid Mosaic Model
Phospholipid bilayer
boundary
lets certain things in and certain things out
not rigid... many parts are constantly moving ... made of organic m…
two layer sandwich
Cell Membrane
boundary
selectively permeable
lets certain things in and certain things out
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