Category 2A - ASsemblies of Molecules, Cells, adn Groups of Cells

At high temperatures, what does cholesterol do?

Cholesterol increases rigidity at high temperatures because the phospholipid bilayer is more fluid

At low temperatures, what does cholesterol do?

Cholesterol increases fluidity at low temperatures because the phospholipid bilayer is more rigid

What are centrosomes?

They are the organelle that contains centrioles

What are centrioles

They are the microtubule organizing center

What si the centromere?

Where the spindle fibers bind to on the chromosomes

What are the three components that make up the cytoskeleton?

Microfilaments, Microtubules, and Intermediate filaments

What makes up microfilaments?

Actin

What are the functions of microfilaments

Help with cellular motility (contractions; change shape of cell to move), muscle contractions (actin), and cytokinesis

What are microtubules made of?

Tubulin

What are teh functions of microtubules?

Function as railroad for intracellular transport, found in spindle apparatus for mitosis, form cilia and flagella (9+2 arrangement)

What do intermediate filaments do?

Support and maintain the shape of the cell