Questions Flashcards
Intercellular signalling (2)
By secreted molecules
By plasma membrane-bound molecules
Signalling by secreted molecules
Paracrine
Endocrine
Synaptic
Definition:
Receptor
Ligand
Km
Ans
Role of receptors in cellular physiology
8
Receptor classifications
2
Receptor vs acceptor
2
Signal transduction
4
Lipids are amphipathic
Explain
Contain both hydrophilic and hydrophobic moiety
What causes kink in fatty acid chain
Cis double bond
General composition of membranes
Ans
Phospholipid motion
4
Effect of cis double bond in membrane
Reduces phospholipid packing
Structure of cholesterol
3
Polar head
Rigid polar sterol region
Non polar fatty acid tail
Paradoxical effects of cholesterol in bilateral
Effects of cholesterol with temperature
Ans
Evidence for proteins in membrane
(3)Functional
Biochemical(2)
Permitted motions for proteins
3
Restrictions of membrane protein mobility
Explain
Aggregation
Tethering
Interaction with other cells
Peripheral vs integral membrane proteins
3
Describe cytoskeleton in erythrocytes
Lattice structure of long spectrin molecules grafted to transmembrane proteins through attachment proteins
Membrane protein biosynthesis
Ans
Why is facilitated diffusion quicker than simple
Ams
Flux(Js)
Ans
Diffusion calc
K is ADs/trianglex
Definition of osmole
Measure of solution’s ability to create osmotic pressure, thus affecting movement of water
Calculating osmolarity
pic ( not actually p)