9.2 Flashcards
What is simple diffusion?
Small, noncharged molecules passing through the membrane. High to low, no energy.
What is facilitated diffusion?
Molecules going through proteins. High to low, no energy.
What is osmosis?
The passage of water from an area of low solute concentration to high. No energy.
What is hypertonic?
Has more of a substance than something else.
What is hypotonic?
Has less of a substance than something else.
What is isotonic?
Has the same amount of substance than something else.
What is active transport?
Molecules going through proteins from low to high, using energy.
What is endocytosis?
Things brought into the cell and then surrounded in cell membrane.
What is exocytosis?
The cell excreting waste.
What are the properties of phospholipids?
Has a hydrophobic and hydrophilic part that helps it make up part of the cell membrane.
What are the structures of phospholipids?
Polar head and non polar tails.
What are the parts of a cell membrane?
Phospholipid bilayer, proteins, cholesterol, carbohydrates.
What is the importance of the surface area : volume ratio?
A higher ratio helps it perform better.
A cell has more solute than the outside, which way will water go?
In.
A cell has less solute than the outside, which way will water go?
Out.
A cell has the same solute as the outside, which way will water go?
Equal both ways.
A cell has more solute than the outside, which way will the solute go?
Out
A cell has less solute than the outside, which way will the solute go?
In
A cell has the same solute as the outside, which way will the solute go?
Equal in and out.
What does cholesterol do?
Stabilizes the cell membrane.
What does the phospholipid bilayer do?
Allows only certain things in.
What do proteins do?
Acts as a passageway for molecules, attaches to cytoskeleton, and sticks cells together.
What do carbohydrates do?
Identifies cells.
What are the types of proteins?
Transporter, enzyme activity, cell surface receptor, identity marker, cell adhesion, attachment to cytoskeleton.
