Membrane Flashcards
Diffusion
The spreading out of molecules from Areas of higher concentration to areas of lower concentration
Phospholipids
Triglyceride molecule missing one fatty acid molecule. It is replaced by a phosphate and alcohol molecule that makes that part of the molecule highly polar well the other end of the molecules nonpolar. Phospholipids make up the majority of the plasma membrane structure.
Osmosis
The diffusion of water across a memberane
Solvent
That part of the solution doing the dissolving
Solute
That part of a solution being dissolved
Hypertonic solution
When the concentration of solute in the solution is greater than in the cell (The slower water concentration).
Hypotonic solution
When the concentration of solute in the solution is less than that of the cell (thus greater water concentration).
Isotonic Solution
When the concentration of solute in the solution is the same as that of the cell (thus water concentration is the same).
Osmotic pressure
The force necessary to stop osmotic movement of water into a cell
Endocytosis
When the cell membrane engulfs and takes in something from the environment
Phagocytosis
“So eating.” The selling engulfs “solids.”
Pinocytosis
“Sell drinking.” The cell engulfs “liquids.”
Exocytosis
Elimination from the cell as vesicles discharge materials across membrane to environment
Active transport
The transport of molecules across a membrane requires energy
How do phospholipids create the plasma membrane
The phospholipids bond together vertically. They use the different polarity of each end to create the plasma membrane
