ib biology membrane structures

describe characteristic of polar molecules in phospholipids

polar molecules are reflected from the hydrophilic heads of the lipid bilayer because they are charged

name an example of the molecules reflected off phopsholipids(lipid bilayer)

glucose which is a large molecule: ddfines low permeability

define simple diffusion

passive movement of molecules from low concentration to high concentration with no energy input required down a gradient

what is the function of integral

integral proteins help to release into cell membrane core

what is a unusual property of water molecules in osmosis

able to move through cell membrane byecause it is permeable so molecules spreading out

how does active transport help to pump proteins

uses atp to move substances against gradients by only using it from high to low concentrations

how does the hydropholic head help to create phospholipid bilayers

it is water soluble(ability to dissolve) ao heads protect structure of cell mebranes

how does the hydrophobic tail help to create phospholipid bilayers

it is non polar for tails to point inwards in cell mebrane to create water free zone

describe a glycoprotein chain sticking out of red blodd cell membrane

a carbohydrate forming with a protein

what is a glycoprotein function in cell to cell recognisition

to determine a person blood type by showing the same antigens they have

describe a glycolipid chain by telling a difference to glycoprotein

the formation of sugar residues and lipid residue where cells help to attach to another