M9: Cell Membrane Structure Flashcards
1.Between the living machinery of the inner cell and the harsh condition of the outside world stands the cells _____________
- as crucial as this barrier is surprisingly __________, push it and watch it move, poke hard enough and it might break and begin to regroup.
- The molecules of the membrane naturally assembled in a _______________
- because their tails _________________as their heads attracted
- throw in some ________________ and a few carbohydrates and you have the basic structure of a plasma membrane
- within these living molecules we also find different _______________ which do various things for the cell
- for instance they receive _____________ from the world outside where they transport nutrients and waste
- so nature composes the membrane with the combination or __________________of different lipids carbohydrates and proteins
- and these molecules are ___________________ and they constantly move within the structure would like changing their positions.
- The survival of all life rest at this veil of material supple membrane just _____________thick.
- plasma membrane
- flexible
- double layer
- repel water
- cholesterol
- proteins
- signals
- mosaic
- non stationary
- two molecule
Is also known as the plasma membrane
Cell Membrane
Is a thin semi-permeable membrane that surrounds the cytoplasm of a cell.
Cell Membrane
- Serves as a barrier that protects the cell from the extracellular environment.
Cell Membrane
- Maintains balance in the interior of the cell by allowing certain substances into the cell while keeping other substances out.
Cell Membrane
- For cell-to-cell communication
Cell Membrane
- For structural support and help maintain its shape.
- serves as a base of attachment for the cytoskeleton in some organisms and the cell wall in others
Cell Membrane
cell membrane > B__________ (m___________) > L____, P_____ and C_____
cell membrane > Biomolecules (macromolecules) > lipid, protein and carbohydrates
lipids
1. lipid B_________
2. C_________
3. G___________
lipids
1. lipid bilayer
2. cholesterol
3. glycolipids
proteins
1. P________ membrane proteins
2. I__________ membrane proteins
3. G____________
- Peripheral membrane proteins
- Integral membrane proteins
- Glycoproteins
Made up of 2 layers of phospholipids
- Lipid Bilayer
2 Parts
1. Hydrophilic head
2. Hydrophobic tails
- Lipid Bilayer
2 Parts
1. hydro______head
2. Hydro______ tails
2 Parts
1. Hydrophilic head
2. Hydrophobic tails
Function
Makes the cell membrane semi permeable.
- Lipid Bilayer
it is a polar covalent compound
hydrophilic head
made of phosphate and glycerol
hydrophilic head
a non polar covalent compound
hydrophobic tail
made of saturated fatty acid and unsaturated fatty acid
hydrophobic tail
Allow passage of hydrophobic molecules and gases.
lipid bilayer
examples of hydrophobic molecules and gases
O2, CO2, CO, NO, E_________ and B_____
Example:
O2, CO2, CO, NO, Ethanol and benzene
Do not allow passage of ions and large hydrophilic molecules.
lipid bilayer
Do not allow passage of ions and large hydrophilic molecules.
Example:
G______, amino acids, Na ion, K ion, p___________ , ATP.
Example:
Glucose, amino acids, Na ion, K ion, phosphate, ATP.
Dispersed between phospholipids
- Cholesterol
Prevents rigidity of cell membrane.
- Cholesterol
Found at the cell membrane surface
- Glycolipid
Lipid + carbohydrate
- Glycolipid
For cell-to-cell recognition.
- Glycolipid
Can be attached to phosphoglyceride lipid (Head) or to integral proteins.
- Peripheral Protein
Move substances in and out of a cell.
activate other proteins and enzymes.
Cell-to-cell interaction interactions.
- Peripheral Protein
Are permanently embedded within the plasma membrane
- Integral Protein
2 Types of integral protein
T___________ protein
M_______proteins
2 Types
Transmembrane protein
Monotopic proteins
Function
Channel or transport molecules across the membrane.
- Integral Protein
attached to the protein or integral protein
- Glycoprotein
Act as a cell receptor
- Glycoprotein
