Lab-Chapter 3 Flashcards
Diffusion is the movement of
Movement of substances from areas of high concentration to areas of low concentration
3 positive/transport processes
Diffusion
Osmosis
Filtration
Osmosis is the movement of
Movement of water through a selectively permeable membrane from areas of high concentration to areas of low concentration
Filtration is the movement of
Movement of water and solute particles across a membrane from areas of high hydrostatic pressure to areas of low hydrostatic pressure
Phospholipids have ____ heads and ___ tails
Hydrophilic
Hydrophobic
Lipid molecules of the phospholipid bilayer:
Phospholipids
Cholesterol
Membrane protein molecules:
Carrier protein
Protein channel
Solute pump
Which of the protein molecules of the membrane are passive transport?
Carrier protein
Protein channels
Which protein of the membrane is an active transport molecule?
Solute pump
Other important chemicals involved with the membrane:
Glucose, water, ions, ATP
Which are the smaller, more abundant molecules?
Phospholipids
Which molecular group is lager in size but smaller in number?
Membrane proteins
Cholesterol stabilizes the membrane. Based on it’s location in the membrane, is cholesterol hydrophilic or hydrophobic?
Hydrophobic
Chemical bonds made and broken during metabolism are due to the movement of ____
Electrons as the move from one atom to another
Substances that don’t move directly into the cell through the lipid portion of it’s membrane require passage through:
A protein channel, carrier, gate or pump.
Active transport-
When the passage of substances through proteins requires ATP
Passive transport-
Doesn’t require ATP but there always a driving force behind passive movement.
What are the types of passive transport?
Osmosis, filtration, diffusion
Glucose can get inside a cell through ____
A carrier protein
Gradient-
A difference in population between 2 areas
Solution=
Solute+Solvent
Solute-
The substance present in the largest amount in solution. The dissolved substance
Solvent-
Components or substances present in small amounts. Dissolving substance.
Tonicity-
Concentration of non-penetrating dilutes present in a solution when compared to “normal” solute concentration in body fluids.
