Lecture 1- Cellular Basis of Physiology Flashcards
What is catalysis?
The process by which a protein enzyme serves as a catalyst to speed a reaction
What is reaction coupling?
The process by which one reaction provides the energy for another reaction
ATP hydrolysis is an example of what kind of reaction?
Reaction coupling
What macromolecule is used to transport other molecules in Membrane Transport
Protein
What is the sodium-potassium pump an example of?
Membrane transport
What kind of protein changes shape when bound to a molecule
Allosteric
What enables allosteric proteins to change shape?
ligand binding, voltage changes, phosphorylation
Can non-polar molecules have polar bonds?
Yes (CO2)
Can ions pass through the lipid membrane without a protein transporter?
No
Three factors that determine the “driving force” of molecules across cell membranes
Chemical concentration, electrical gradient, and pressure
What is pressure within a vein/artery?
Oncotic pressure
Does diffusion into the surrounding tissue occur when oncotic pressure is low(vein) or high(artery
High
What happens if there is low oncotic pressure?
Ascites-related heart failure. Fluid builds up in tissues
In the sodium-potassium pump, ___ Na+ is pumped out for every ____ K+ ions pumped in
3 Na+ out, 2 K+ in
