Control Of Movements Through Plasma Cell Flashcards
What is membrane transport?
Where the Plasma membrane acts as a barrier where nutrients must get in and waste and products must get out.There are levels of permeability of the cell
What type of permeability is the Plasma membrane?
Selectively permeable it allows some materials to move freely and restricts other materials
What does selective permeability restruct materials based on?
Size
Electrical charge
Molecular shape
Lipid solubility
What factors affect diffusion?
Distance
Molecule size
Temperature
Gradient size
Electrical forces
What are the kind of materials that diffuse through plasma membrane by simple diffusion?
Lipid solvable compounds(fatty acids,steroid)
O2 and Co2
What are materials that pass through transmembrane channels?
Water soluable compounds
Ions
What is a concentration gradient?
The difference between high and low concentrations
What is Active transport?
Where carrier proteins actively transport solutes across a membrane against a concentration gradient
The availability of the carrier and ATP affects rate
Na,K,CA,Mg2 are involved
What is secondary active transport?
Where carrier proteins are passively transport 2 solutes with 1 moving down the concentration gradient and allowing Atp to expand to eject Na and substances involved are glucose and amino acids
What’s endocytosis?
Creation of membronous vessicles containing fluid or solid material
What is exocytosis?
Fusion of vessicles containing solid or liquids with the Plasma membrane
What is carrier mediated transport.
Facilitated diffusion and active transport
What is facilitated diffusion?
Passive
Where transport molecules are too large too fit through channel proteins so molecule binds to receptor site on carrier protein and protein changes shape molecules pass through
