Study sets matching "biology membranes"

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Study sets matching "biology membranes"

30 terms
Membranes & Transport - AP Biology
aquaporin
bulk transport
carrier protein
channel protein
Channel protein through which water can diffuse across a memb…
Movement of substances too large for protein transport into o…
Protein that combines with an transports a molecule or ion ac…
Protein that forms a channel that allows a particular molecul…
aquaporin
Channel protein through which water can diffuse across a memb…
bulk transport
Movement of substances too large for protein transport into o…
Biology: Membranes
Plasma Membrane
Phospholipid bilayer
Cholesterol
Two Types of Proteins
forms the outer thin, flexible, but stable layer of the cell,…
main component of the cell membrane: two layers of lipids, th…
(animal cell membranes) Keeps some small molecules from enter…
Intergral Proteins and Peripheral proteins
Plasma Membrane
forms the outer thin, flexible, but stable layer of the cell,…
Phospholipid bilayer
main component of the cell membrane: two layers of lipids, th…
Biology : Membranes
An artificial membrane was made. It co…
Explain what causes the phospholipid m…
describe the property of the cell surf…
Osmosis has been described as a specia…
(i) Both membranes contain phospholipid / lipid (bilayer); 1…
Head hydrophilic/ attracted to water/ polar;... Tail hydrophobic…
Partially permeable / only allows water molecules through /... d…
Passive / does not require ATP;... R energy not required... movemen…
An artificial membrane was made. It co…
(i) Both membranes contain phospholipid / lipid (bilayer); 1…
Explain what causes the phospholipid m…
Head hydrophilic/ attracted to water/ polar;... Tail hydrophobic…
22 terms
Biology - Membranes
Semi-permeable
Osmosis
Difussion
facilitated diffusion
...
Movement of water from high water concentration to low water…
Passive movement of solute from an area of high concentration…
Passive process that moves large/polar molecules via membrane…
Semi-permeable
...
Osmosis
Movement of water from high water concentration to low water…
8 terms
Biology - Membranes
Cell membrane
Lipid bi-layer
Active Transport
Passive Transport
completely surrounds each cell, allows specific molecules int…
Cell membrane is made of 2 layers of lipids called a bi-layer.
The movement of substances across a membrane against a concen…
The movement of substances across a membrane without requirin…
Cell membrane
completely surrounds each cell, allows specific molecules int…
Lipid bi-layer
Cell membrane is made of 2 layers of lipids called a bi-layer.
39 terms
Biology-Membranes
Selective Permeability
Amphipathic
Fluid Mosaic Model
What primarily holds membranes together?
Membranes allow some substances to cross more easily than oth…
Has both hydrophilic and hydrophobic regions
Membrane is a mosaic of protein molecules bobbing in a fluid…
Hydrophobic interactions (weaker than covalent bonds)
Selective Permeability
Membranes allow some substances to cross more easily than oth…
Amphipathic
Has both hydrophilic and hydrophobic regions
28 terms
Biology Membranes
3 components of plasma membranes
Role of phospholipids
Role of proteins
Role of Carbohydrates
Phospholipids, proteins, carbohydrates
Forms the fluid bilayer
transporting and creating enzymes
Forms glycolipids and glycoproteins , important in cell commu…
3 components of plasma membranes
Phospholipids, proteins, carbohydrates
Role of phospholipids
Forms the fluid bilayer
Biology - Membranes
Draw and label a diagram to show the s…
Explain how the hydrophobic/hydrophili…
What does hydrophobic mean?
What does hydrophilic mean?
See attached palm card
The hydrophilic heads face there water, while the hydrophobic…
Not attracted to water, but are attracted to other hydrophobi…
Attracted to water.
Draw and label a diagram to show the s…
See attached palm card
Explain how the hydrophobic/hydrophili…
The hydrophilic heads face there water, while the hydrophobic…
51 terms
Campbell BIOLOGY - Chapter 7 (membranes)
plasma (cell) membrane
selective permeability
amphipathic
hydrophilic
phospholipid bilayer that surrounds cell, separates it from o…
process in which a membrane allows some molecules to pass thr…
when molecule has both hydrophobic and hydrophilic sections
head of phospholipid
plasma (cell) membrane
phospholipid bilayer that surrounds cell, separates it from o…
selective permeability
process in which a membrane allows some molecules to pass thr…
15 terms
Membranes - Biology
what does a membrane do?
what is a membrane composed of?
what is a bilayer?
what is a phospholipid?
encloses a living cell
a bilayer of phospholipids with embedded and attached proteins
a double layer
a lipid with a phosphate group
what does a membrane do?
encloses a living cell
what is a membrane composed of?
a bilayer of phospholipids with embedded and attached proteins
73 terms
Biology (Membranes)
An atom can form up to __ single coval…
What is a covalent bond?
A(n) __ bond joins 2 pairs of electrons.
The innermost electron shell of an ato…
4
A covalent bond is one in which electron pairs are shared
Double covalent bond
2
An atom can form up to __ single coval…
4
What is a covalent bond?
A covalent bond is one in which electron pairs are shared
15 terms
Biology: Membranes and Membrane Transport
To let all but not all materials throu…
During passive transport, substances w…
Osmosis is the movement of _____ from…
What part of the phospholipid is charg…
Semi-permeable
Higher to lower concentration
Water concentration, higher, lower
Phosphate head
To let all but not all materials throu…
Semi-permeable
During passive transport, substances w…
Higher to lower concentration
Membranes & Transport - AP Biology
aquaporin
bulk transport
carrier protein
channel protein
Channel protein through which water can diffuse across a memb…
Movement of substances too large for protein transport into o…
Protein that combines with an transports a molecule or ion ac…
Protein that forms a channel that allows a particular molecul…
aquaporin
Channel protein through which water can diffuse across a memb…
bulk transport
Movement of substances too large for protein transport into o…
15 terms
Biology/Cell Membranes
PHOSPHOLIPID BILAYER
HYDROPHILIC
HYDROPHOBIC
HYPERTONIC solution
2 layers of phospholipid molecules that make up cell membrane
water "loving", all polar molecules are hydrophilic
water "fearing" , all non-polar molecules are hydrophobic
amount of solute (dissolved stuff in water) is HIGHER outside…
PHOSPHOLIPID BILAYER
2 layers of phospholipid molecules that make up cell membrane
HYDROPHILIC
water "loving", all polar molecules are hydrophilic
Biology Membranes
Diffusion
Osmosis
Simple diffusion
Facilitated diffusion
The net movement of molecules from a region of a high concent…
The net movement of water molecules across a semi permeable m…
Small, non polar molecules that freely diffuse across the mem…
Larger, polar substances eg ions and macromolecules that cann…
Diffusion
The net movement of molecules from a region of a high concent…
Osmosis
The net movement of water molecules across a semi permeable m…
122 terms
Membrane Biology
cell fractionation
homogenization
centrifuge
pellet
method of separating cell parts to study their function
disrupting cell membrane without damaging organelle
instrument spinning at high speeds to separate contents by de…
larger, more dense components of centrifuged tube
cell fractionation
method of separating cell parts to study their function
homogenization
disrupting cell membrane without damaging organelle
21 terms
Cell Biology #1 (Membranes)
Cell Membrane
Phospholipid
Hydrophobic
Hydrophilic
the thin bilayer of phospholipids that surround the cell and…
A lipid molecule with a polar end (phosphate head) and a non-…
avoidance of (fear of) water
attraction to (love of) water
Cell Membrane
the thin bilayer of phospholipids that surround the cell and…
Phospholipid
A lipid molecule with a polar end (phosphate head) and a non-…
60 terms
Biology Transport Across Membranes
flexible
balanced
equilibrium
by controlling what enters and leaves…
Cell membranes of unicellular organisms are _____ so the orga…
what is meant by homeostasis
homeostasis is also called
how does the plasma membrane help maintain homeostasis
flexible
Cell membranes of unicellular organisms are _____ so the orga…
balanced
what is meant by homeostasis
31 terms
AS Biology membranes
cell membrane
phospholipid bilayer
phospholipid
protein
A thin, flexible barrier around a cell; regulates what enters…
A double layer of phospholipids that makes up plasma and orga…
A molecule that is a constituent of the inner bilayer of biol…
An organic compound that is made of one or more chains of ami…
cell membrane
A thin, flexible barrier around a cell; regulates what enters…
phospholipid bilayer
A double layer of phospholipids that makes up plasma and orga…
Membranes; Honors Biology Expectations
Describe the fluid mosaic structure of…
List five functions of membrane proteins
Explain how membranes exhibit selectiv…
Explain how the structure of phospholi…
The fluid mosaic model of a cell membrane structure consists…
Transport, enzymatic activity, signal transduction, cell-cell…
Membranes choose what passes through them
Phospholipids have hydrophobic tails and hydrophilic heads wh…
Describe the fluid mosaic structure of…
The fluid mosaic model of a cell membrane structure consists…
List five functions of membrane proteins
Transport, enzymatic activity, signal transduction, cell-cell…
Biology: Membranes
What is the model of the membrane stru…
Definition of Intrinsic Protein
Defintion of Extrinsic Protein
Definition of Transmembrane Protein
The Fluid-Mosaic Model
A protein which crosses the whole membrane e.g. carrier prote…
A protein which is on one side of the membrane only
A protein which crosses the whole membrane.
What is the model of the membrane stru…
The Fluid-Mosaic Model
Definition of Intrinsic Protein
A protein which crosses the whole membrane e.g. carrier prote…
196 terms
AQA Biology - Cell Membranes
Draw the structure of a Eurkaryotic ce…
Draw and explain the structure of a ce…
Function of cell-surface membrane?
Draw and explain the structure of the…
~ Found on the surface of animal cells and inside the cell wa…
~ Regulates the movement of substances in and out of cells... ~…
~ Large protein surrounded by a double-membrane (nuclear enve…
Draw the structure of a Eurkaryotic ce…
Draw and explain the structure of a ce…
~ Found on the surface of animal cells and inside the cell wa…
47 terms
Biology membranes
What elements do lipids contain?
What are the functions of lipids?
What are the two main groups of lipids?
Describe the feature of a phospholipid
Lipids contain carbon, hydrogen and oxygen
Insulation (neurones)... Sources of energy... Water proofing... Pro…
Triglycerides and phospholipids
Two fatty acid molecules and a phosphate group joined to a gl…
What elements do lipids contain?
Lipids contain carbon, hydrogen and oxygen
What are the functions of lipids?
Insulation (neurones)... Sources of energy... Water proofing... Pro…
14 terms
Biology membranes
Osmosis
What is a cell made up of
Exocytosis
Hydrophilic
Water molecules move from high to low
Phospholipid bilayer
Cells release waste
When a substance can mix with water
Osmosis
Water molecules move from high to low
What is a cell made up of
Phospholipid bilayer
22 terms
IB Biology II: Membranes
plasma membrane
cytoplasm
intracellular
extracellular
The flexible barrier found on the outside of cells that regul…
The fluid filled region outside the nucleus and inside the pl…
Inside the cell
Outside the cell
plasma membrane
The flexible barrier found on the outside of cells that regul…
cytoplasm
The fluid filled region outside the nucleus and inside the pl…
40 terms
biology membranes
What is the function of cholesterol wh…
Which part of the plasma membrane belo…
Which part of the plasma membrane belo…
Which part of a phospholipid is nonpol…
It stabilizes the membrane (so it doesn't come apart)... b) At…
fatty acid chains-that's why they face towards the inside of…
phosphate group - that's why they face outwards to be in cont…
the 2 fatty acid chains
What is the function of cholesterol wh…
It stabilizes the membrane (so it doesn't come apart)... b) At…
Which part of the plasma membrane belo…
fatty acid chains-that's why they face towards the inside of…
Biology- Membranes
Which types of molecules can easily pa…
What are ways that a membrane's fluidi…
How does the presence of cholesterol a…
Define Diffusion and Osmosis in your o…
Small and Nonpolar molecules (Oxygen) can cross through easil…
Affected by:... 1. Fatty acid composition... 2. Membrane steroids…
...
Diffusion: The movement of a molecule from high to low concen…
Which types of molecules can easily pa…
Small and Nonpolar molecules (Oxygen) can cross through easil…
What are ways that a membrane's fluidi…
Affected by:... 1. Fatty acid composition... 2. Membrane steroids…
29 terms
Biology: Membranes
What does it mean to be selectively pe…
What types of particles are (easily) a…
What types of particles are not easily…
What are the two types of transport?
To allow only the wanted or needed particles inside
- small particles... - uncharged particles... - things that follow…
- large particles... - charged particles (because the exterior i…
Active (hard) and passive (easy)
What does it mean to be selectively pe…
To allow only the wanted or needed particles inside
What types of particles are (easily) a…
- small particles... - uncharged particles... - things that follow…
biology - membrane
osmosis
the plasma membrane
phospholipids
cholestrol
the passive diffusion of free water molecules across a semi p…
forms the boundary between inter-cellular and extra-cellular…
it is made up of a double layer of fatty ___________ interspe…
melocules lie between the phospholipids and prevent it from b…
osmosis
the passive diffusion of free water molecules across a semi p…
the plasma membrane
forms the boundary between inter-cellular and extra-cellular…
29 terms
Biology Chapter 5: Membranes
Phospholipid Bilayer
Fluid Mosaic Model
Transmembrane Proteins
Interior Protein Network
Plasma membrane layers composed of phospholipid molecules arr…
Mosaic of proteins floats in or on the fluid lipid bilayer li…
Proteins embedded in the membrane that serve as transporters…
membranes are structurally supported by intracellular protein…
Phospholipid Bilayer
Plasma membrane layers composed of phospholipid molecules arr…
Fluid Mosaic Model
Mosaic of proteins floats in or on the fluid lipid bilayer li…
Biology - Membranes
Semi-permeable
Osmosis
Difussion
facilitated diffusion
...
Movement of water from high water concentration to low water…
Passive movement of solute from an area of high concentration…
Passive process that moves large/polar molecules via membrane…
Semi-permeable
...
Osmosis
Movement of water from high water concentration to low water…
Biology Membranes
Osmosis
Diffusion
Facilitated Diffusion
Active Transport
The net movement of water from a region of high water concent…
The net movement of a substance from a region of high concent…
The net movement of a substance from a region of high concent…
Dissolved substances moving against the concentration gradien…
Osmosis
The net movement of water from a region of high water concent…
Diffusion
The net movement of a substance from a region of high concent…
27 terms
AP Biology Cell Membrane
Selective Permeability
phospholipid bilayer
Integral Proteins
Peripheral Proteins
Allows some substances to cross more easily than others
a double layer of phospholipids that makes up plasma membranes
Proteins that extend through the phospholipid bilayer.
A protein loosely attached to the surface of a membrane
Selective Permeability
Allows some substances to cross more easily than others
phospholipid bilayer
a double layer of phospholipids that makes up plasma membranes
Biology, Cells and Cell Membranes
Osmosis
hypertonic solution
hypotonic solution
isotonic solution
Diffusion of water through a selectively permeable membrane
A solution in which the concentration of solutes is greater t…
A solution in which the concentration of solutes is less than…
A solution in which the concentration of solutes is essential…
Osmosis
Diffusion of water through a selectively permeable membrane
hypertonic solution
A solution in which the concentration of solutes is greater t…
Biology -- Membrane
Membrane is made up of
Tails of phosopholipids are____
Top of molecule is ___ and bottom is _…
define: hydrophilic
millions of phosopholipids
unsaturated because they are bent
polar; nonpolar
polar molecules that will disolve in water
Membrane is made up of
millions of phosopholipids
Tails of phosopholipids are____
unsaturated because they are bent
Biology - Membranes Test
What are the characteristics common to…
What are the differences between eukar…
Explain the differences between hypert…
4. What are the differences between pa…
membrane (or a place to store data) (nucleus or nucleoid)... cyt…
Prokaryotes have no membrane-bound organelles... Eukaryotes do h…
Tonicity: the relative solute concentrations of two liquids... H…
Passive transport ... No additional energy required... Always moves…
What are the characteristics common to…
membrane (or a place to store data) (nucleus or nucleoid)... cyt…
What are the differences between eukar…
Prokaryotes have no membrane-bound organelles... Eukaryotes do h…
20 terms
AP Biology Membranes - Torres
Selectively permeability
Osmosis
Turgid
Amphipathic Molecule
A selectively permeable cell membrane is one that allows cert…
Osmosis is the spontaneous net movement of solvent molecules…
adjective - swollen and distended or congested.
molecule that possesses both hydrophobic and hydrophilic elem…
Selectively permeability
A selectively permeable cell membrane is one that allows cert…
Osmosis
Osmosis is the spontaneous net movement of solvent molecules…
Cell Biology 380 Membranes
Activation Energy
Enzyme lowers activation energy
phosphoanhydride bond
function
What lowers activation energy?
What type of bond gives energy to create a positive delta G?
structure leads to _____
Activation Energy
Enzyme lowers activation energy
What lowers activation energy?
11 terms
Biology - Membrane
Membrane function
Membrane composition
Passage through
Diffusion
- Aka plasma membrane... - Most organelles formed from membrane…
- Fluid structures... - Composed of phospholipid bilayer
- Tiny molecules and oil-soluble substances easily pass throu…
Passive net movement of molecules from high concentration to…
Membrane function
- Aka plasma membrane... - Most organelles formed from membrane…
Membrane composition
- Fluid structures... - Composed of phospholipid bilayer
61 terms
9th Grade Biology Membranes
Phospholipids
Amphipathic Molecules
Fluid Mosaic Model
Membranes
-the most abundant lipid in the plasma membrane... -amphipathic…
-have hydrophillic and hydrophobic regions
-states that a membrane is a fluid structure with a "mosaic"…
-acts as a boundary in an organism... -collage of different prot…
Phospholipids
-the most abundant lipid in the plasma membrane... -amphipathic…
Amphipathic Molecules
-have hydrophillic and hydrophobic regions
26 terms
SSFC Biology Lipids and membranes
Triglyceride (molecule)
Phospholipid (molecule)
Hydrophilic
Hydrophobic
A lipid composed of a glycerol molecule chemically bonded to…
Glycerol condensed to two fatty acids and a phosphate group.
An interaction where 2 groups are attracted to each other e.g…
An interaction where 2 groups are repelled from each other e.…
Triglyceride (molecule)
A lipid composed of a glycerol molecule chemically bonded to…
Phospholipid (molecule)
Glycerol condensed to two fatty acids and a phosphate group.
IB Biology Unit 2- Membranes
Describe the Davson-Danielli model of…
Describe the Singer-Nicolson model of…
Outline the evidence for the Singer-Ni…
Describe the function of cholesterol i…
phospholipid bilayer covered by a thin layer of proteins on b…
phospholipid bilayer with proteins inserted into bilayer
-not all membranes are identical(as the Davson model indicate…
-found in hydrophobic region at various locations in animal c…
Describe the Davson-Danielli model of…
phospholipid bilayer covered by a thin layer of proteins on b…
Describe the Singer-Nicolson model of…
phospholipid bilayer with proteins inserted into bilayer
13 terms
Biology-Cell Membrane
Cell Membrane
Semipermeable
Phospholipid
Diffusion
A cell structure that controls which substances can enter or…
(of a membrane) selectively permeable, allows some substances…
A molecule that is a constituent of the inner bilayer of biol…
Movement of molecules from an area of higher concentration to…
Cell Membrane
A cell structure that controls which substances can enter or…
Semipermeable
(of a membrane) selectively permeable, allows some substances…
20 terms
Cell Membrane - AP Biology
Selectively permeability
Osmosis
turgid
Amphipathic molecule
it allows some things to come through and some not
Diffusion of water through a selectively permeable membrane
swollen as from a fluid; bloated
A molecule that has both a hydrophilic region and a hydrophob…
Selectively permeability
it allows some things to come through and some not
Osmosis
Diffusion of water through a selectively permeable membrane
40 terms
Biology- membrane
Amphiphatic
Fluid mosaic model
Peripheral proteins
Integral
Molecules have both hydrophobic regions and hydrophilic regions
Membrane is a fluid structure with a "mosaic" of various prot…
Are not embedded in lipid bilayer ... Loosely bound to surface…
Penetrate hydrophobic core of lipid bilayer... Often completely…
Amphiphatic
Molecules have both hydrophobic regions and hydrophilic regions
Fluid mosaic model
Membrane is a fluid structure with a "mosaic" of various prot…
20 terms
Cell Membrane - AP Biology
Selectively permeability
Osmosis
turgid
Amphipathic molecule
it allows some things to come through and some not
Diffusion of water through a selectively permeable membrane
swollen as from a fluid; bloated
A molecule that has both a hydrophilic region and a hydrophob…
Selectively permeability
it allows some things to come through and some not
Osmosis
Diffusion of water through a selectively permeable membrane
11 terms
Biology Membranes
A microscope with a 4x objective lens…
What type of molecule forms a lipid bi…
Name three functions of the cell membr…
Diffusion is the movement of a substan…
40x
phospholipids
Encloses the contents of a cell, allows materials to enter an…
high concentration to an area of low concentration
A microscope with a 4x objective lens…
40x
What type of molecule forms a lipid bi…
phospholipids
17 terms
Biology: The Membrane
Fluid Mosaic Model
Selective permeability
Concentration gradient
Passive transport
Complex model of the cell membrane showing the double layer o…
The ability of the membrane to choose what molecules could en…
The difference in how much of a material there is from one po…
The movement of things in and out of the membrane without usi…
Fluid Mosaic Model
Complex model of the cell membrane showing the double layer o…
Selective permeability
The ability of the membrane to choose what molecules could en…
25 terms
Membranes and Transport (Biology)
Active Transport
Passive Transport
diffusion
Osmosis
high energy transport
doesn't require energy... O and H20 get into cell
molecule goes from a high concentration to a lower in order t…
type of diffusion where water diffuses across a membrane
Active Transport
high energy transport
Passive Transport
doesn't require energy... O and H20 get into cell
18 terms
Biology, membrane
Chromatin
Centriole
Chromosome
Centromere
When DNA is invisible threads during Interphase
Organelle in the cell that moves to the poles and coordinates…
DNA wrapped around proteins - you have 46 of them
The place where sister chromatids stick together
Chromatin
When DNA is invisible threads during Interphase
Centriole
Organelle in the cell that moves to the poles and coordinates…
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