Lab 3 Quiz Flashcards
What is a solute?
A substance that is dissolved in a liquid
What is a solvent?
A liquid that has dissolved or can dissolve one or more solutes
What is a solution?
A liquid (solvent) and it’s dissolved solutes
What is diffusion?
The random movement of molecules from an area of high concentration to an area of low concentration of a substance
Ex: gasses exchanged between cell and environment
What is osmosis?
The movement of a solvent through a selectively permeable membrane from low solute concentration to high solute concentration
What is an isotonic condition?
Where the solute concentrations are the same inside and outside of the cell
Results in equal movement of water into and out of cell
What is a hypertonic cell? A hypertonic environment?
Cell- when the cell has a higher solute concentration than the environment
Water moves into the cell
Environment- when the environment has a higher solute concentration than the cell
What is a hypotonic cell? A hypotonic environment?
Cell- when the cell has a lower solute concentration that the environment
Water moves out of cell
Environment- when the environment has a lower solute concentration than the cell
What is turgor pressure?
The force of the plasma membrane outward from the increase of volume of the central vacuole after osmosis occurs
What is the phenomenon plasmolysis?
When the concentration of a solute becomes higher outside a plant cell then inside and causes water to move out which cause the central vacuole to decrease Volume and plasma membrane pull from cell wall which can kill cell
What are the two big steps in eukaryotic cell division?
Mitosis- division of nucleus
Cytokinesis- division of cytoplasm
What is the root apical meristem?
The region of rapidly diving cells near the top of the root
What is a colony
Composed of individual cells organisms that adhere to eachother and may communicate
What is the difference between volox and eudorina?
Volvox has an increased number of cells resulting in a larger overall size
Most notable: the irreversible specialization of cell types in Volvox, making it a multicellular organism
What do prokaryotic cells use to divide? And eukaryotic cells?
Pro- binary fission
Euk- mitosis and cytokinesis
