Double layer of phospholipid. Phospholipids are not bonded to each other.
What is phospholipid bilayer?
100
What is the function of the receptor-mediated endocytosis?
to transport specific particles.
100
A solution with a solute concentration that is equal to another solution
What is isotonic?
100
Types of Bulk Transport
What is Endocytosis and Exocytosis?
100
The ability of a membrane to choose what can or cannot get across it
What is Semi-permeable?
200
Structure of the membrane in which substances of liquid/gas change shape w/o breaking apart and whose molecules move freely in a lumpy, constantly shifting mosaic of tiles
What is fluid mosaic?
200
Process to pick up larger particles. The cell extends parts of its surface membrane (pseudopods) that fuse together around the particle and carries it into the cell inside a vesicle
What is phagocytosis?
200
Unassisted process; solutes are lipid-soluble or small enough to pass through membrane pores
What is simple diffusion?
200
a carrier protein that transports 3 Na molecules out of and 2 K molecules into the cell
What is sodium-potassium pump?
200
diffusion of water molecules across a membrane from area of high water concentration to area of lower water concentration; passive transport
What is osmosis?
300
The head of the phospholipid molecule that is attracted to water molecules
What is hydrophilic?
300
What is the function of protein channels?
permit passive diffusion
300
The maximum amount of water in a plant cells vacuole, causing it to expand.
What is turgid?
300
True or False:
active transport → the act of moving a molecule 'up' the concentration gradient
True
300
Avoids water
What is hydrophobic?
400
Membrane protein that delivers chemical messages to the cell. Triggers responses inside the cell when specific molecules outside the cell bind to them
receptor proteins
400
What is a benefit to Facilitated Diffusion?
uses no ATP
400
A linkage of two adjacent cells consisting of a system of channels extending across a gap from one cell to the other
What is gap junction?
400
Name of specific substaces that bind to the receptor during receptor-mediated endocytosis?
What is Lygand?
400
Allows water to cross membranes by facilitated diffusion which is faster than simple diffusion.
What is aquaporins?
500
A passive transport protein that forms channels in the lipid bilayer through which certain ions can cross the membrane
Channel Proteins
500
"cell drinking"
What is pinocytosis?
500
when plants are in isotonic surroundings they become __________ because there is no tendency for water to enter the cell
Flaccid
500
Paramecium's osmoregulation mechanism
What is contactile vacuole?
500
A difference in concentration from one area to another.