Chapter 1: Principles of Cell Function Flashcards
(18 cards)
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
What is the dif. between isotonic and isomolar
Isotonic is in reference to a red blood cell and isomolar between any two subtances
Is the oncotic pressure accounted for in Vant Hoff’s Law
No, oncotic pressure is generated by large molecules that do not conform to vant Hoff’s Law
Specific Gravity
The weight of a solution divided by the weight of the same volume of distilled H20
