plasma membrane

Question 1

plasma membrane

Answer 1

fluid mosaic model

mixture and movement of:
- phospholipids
- proteins
- glycoproteins
- glycolipids

arranged within phospholipid bilayer creating partially permeable membranes

Question 2

phospholipids

Answer 2

aligns as a bilayer

hydrophobic heads attract water

hydrophilic rails repel water

Question 3

partially permeable membrane

Answer 3

lipid soluble substances and very small molecules can pass through

eg: hormones

water soluble molecules and larger molecules (sodium, glucose) can’t pass through it

Question 4

protein carriers

Answer 4

forms tubes that fill with water to enable water soluble ions to diffuse

can bind with other large molecules to change the shape and transport them to the other side of the membrane

Question 5

cholesterol

Answer 5

restricts lateral movement of other molecules

makes membrane less fluid at high temperatures

prevents water and dissolved ions from leaking out of the cell

Question 6

proteins that are embedded across cell surface membrane

Answer 6

peripheral

integral

Question 7

peripheral

Answer 7

provides mechanical support

connected to proteins and lipids to make glycoproteins and glycolipids

Question 8

integral

Answer 8

protein carries involved in transport of molecules across membranes