1: Introduction Flashcards
membranous organelles
mitochondria, endoplasmic reticulum, golgi apparatus, peroxisomes, lysosomes
non-membranous organelles
ribosomes, cytoskeleton, centrioles
Rough ER
site of synthesis of proteins that will be secreted from cell
Smooth ER
involved in synthesis of lipids (steroids), metabolism of lipid-soluble substances, and regulates the concentration of calcium in all cells
Golgi apparatus
transport vesicles from rough ER
What 3 different pathways may the golgi apparatus transport a vesicle?
- to be secreted by exocytosis
- to be incorporated into the plasma membrane
- to a phagosome
Peroxisomes
membranous sacs containing powerful detoxifying substances that neutralize toxins; also play a role in fatty acid synthesis
Lysosomes
membrane-bound sacs containing digestive enzymes
3 types of cytoskeleton
- microfilaments
- intermediate filaments
- microtubules
What makes up centrosomes?
microtubules
3 parts of a nucleus
- nuclear envelope
- nucleoli
- chromatin
Nuclear envelope is a ____ layer
double
2 major periods of cell cycle
interphase and cell division (mitotic phase)
3 sub-phases of interphase
G1, S, and G2
G1
gap 1: vigorous growth and metabolism