Cell Membrane
What is diffusion?
molecules move across the membrane (high to low concentration), using no energy, with the gradient.
What is a solute?
Molecule being dissolved
List the stages of mitosis in order
PMAT
G1, S, G2, Mitosis, Cytokinesis
What is another name for the phospholipid bilayer?
Cell membrane or plasma membrane
What is osmosis?
What is a solution?
Substance doing the dissolving
What happens during cytokinesis?
the cytoplasm splits and it creates 2 new cells
What happens during interphase?
the cell grows and copies DNA
What does it mean to be selectively permeable?
Allows certain things in and out of the cell
What do we use endocytosis and exocytosis for in a cell?
Moving large particles in and out of the cell
If a cell has 70% solute and the solution has 30% solute, which direction is the water moving?
The water moves into the cell.
What is the purpose of mitosis?
splitting the nucleus and chromosomes evenly
Why does a cell need checkpoints?
to make sure all is correct in the cell
What types of molecules can easily pass through the plasma membrane without using a transport protein?
Small, nonpolar molecules (like oxygen and carbon dioxide) and some small uncharged molecules (like water, to a limited extent).
What is active transport?
Movement of molcules, against the gradient, using energy.
A cell has 70% solute and the solution has 30% solute. Is the solution hypotonic, isotonic, or hypertonic to the cell?
Hypotonic
Why do chromosomes need to line up in metaphase?
So the chromosomes can split evenly
What is the purpose of the cell cycle?
to create 2 identical cells
What is the model that describes the plasma membrane as a flexible layer where proteins float in a sea of phospholipids.
The fluid mosaic model
What type of transport does your cell want to use? Expain.
Passive transport because it doesn't require energy.
If a cell has an equal concentration of solute to the solution, what happens to the water?
The water moves freely, but in equal concentration.
Is mitosis a part of interphase?
no
What are the checkpoints of the cell cycle?
G1, S, G2, M