Cell SF Exam 1 Flashcards
(50 cards)
4 classes of macromolecules
protiens, carbohydrates, nucleic acid, lipids
____ controls bilayer rigidity and H2O permeability
cholesterol
transmembrane amino acids are (polar/nonpolar)
nonpolar
Is the bilayer symmetrical?
No
A uniporter moves one molecule (up/down) the gradient
down
____ are the fastest membrane transport proteins
ion channels
what triggers a shape change in a uniporter?
R group
process using uniporters is sometimes called _____ diffusion.
facilitated
Type of membrane transport involved in both active and passive transport
cotransporters
type of membrane transport where the energy from passive transport is used for active transport
cotransporters
secondary active transport
energy from passive transport is used in active transport
cotransporter where molecules are moving in opposite directions
antiporter
cotransporter where molecules are moving in the same direction
symporter
Na+ is ____ outside the cell and ____ inside the cell
high, low
K+ is ___ outside the cell and ___ inside the cell
low, high
Ca2+ is ____ outside the cell and ____ inside the cell
high, low
Sodium potassium ATPase
uses energy of ATP hydrolysis to move both Na+ and K+ against gradient
For every ___ K+ moved into the cell, ___ Na+ moves out to depolarize
2, 3
The inside of a cell is ___ charged in comparison to the outside
negatively
Impermeate anion effect
a particle that cant cross the membrane because of its charge
3 major categories of electrically excitable cells
muscle, endocrine, nerve
when the inside of the neuron gets more positively charged this is called ____
depolarization
Neurotransmitters bind to ______ to start the domino effect of depolarization
Ligand gated Na+ channels
Does Na+ channel or K+ channel open faster?
Na+
