Chapter 1: Principles of Cell Function Flashcards
Fluid Mosaic
Theory that explains the asymmetrical (regional) distribution of phospholipids and proteins in the membrane
Phospholipids on the outer-leaflet (2)
Phosphatydilcholin
sphingomyelin
Phospholipids on the inner-leaflet (3)
Phosphoethanolamine
Phosphatydilinositol
Phosphatidylserine
Fx of Glycosilphosphatidylinositol
Helps anchor proteins to the membrane
What factors increase membrane fluidity
Temperature
unsaturated phospholipids
Types of membrane proteins
Integral proteins
trans-membrane proteins
Peripheral proteins
Prot. with lipid anchors
Types of endocytosis
Pinocytosis
Phagocytosis
Receptor mediated endocytosis
Types of exocytosis
Constitutive
Regulated
What is Fick’s Law and what does it state
J=-P(Ci-Co)
It states the amount of a substance that will diffuse through a membrane give a certain concentration gradient
What is the electrochemical gradient
The electrochemical gradient is the combination of the electrical and chemical gradients and is used to quantitate the driving force of a molecule to move across a membrane
What is the Nerst equation
(61.5/Zx)log (Ca/Co)
Kinds of molecular transport
Active Transport
Primary Active Transport
Secondary Active Transport
Passive Transport
What is Osmosis
Osmosis is the movement of H20 across a semipermeable membrane
What is Osmotic Pressure
Osmotic pressure is the pressure generated by the solutes (# of molecules) in a solution driving the movement of H20
Dif. between osmolarity and osmolality
Osmolarity- The pressure generated by the molecules in 1L of solvent
Osmolality- The number of molecules per Kg of solvent
