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Anatomy Midterm
Weeks 1-5
| Question | Answer |
|---|---|
| Plasma membrane | Phospholipid bilayer reinforced with cholesterol and embedded with proteins and other organic molecules |
| Endoplasmic reticulum (ER) | Network of canals and sacs extending from the nuclear envelope; may have ribosomes attached |
| Golgi apparatus | Stack of flattened sacs (cisternae) surrounded by vesicles |
| Vesicles | Tiny membranous bags |
| Lysosomes | Tiny membranous bags containing enzymes |
| Peroxisomes | Tiny membranous bags containing enzymes |
| Mitochondria | Tiny membranous capsule surrounding an inner, highly folded membrane embedded with enzymes; has small, ringlike chromosome (DNA) |
| Nucleus | A usually central, spherical double-membrane container of chromatin (DNA); has large pores |
| Ribosomes | Small particles assembled from two tiny subunits of rRNA and protein |
| Proteasomes | Hollow protein cylinders with embedded enzymes |
| Cytoskeleton | Network of interconnecting flexible filaments, stiff tubules, and molecular motors within the cell |
| Centrosome | Region of cytoskeleton that includes two cylindrical groupings of microtubules called centrioles |
| Microvilli | Short, fingerlike extensions of plasma membrane; supported internally by microfilaments |
| Cilia and flagella | Moderate (cilia) to long (flagella) hairlike extensions of plasma membrane; supported internally by cylindrical formation of microtubules, sometimes with attached molecular motors |
| Nucleolus | Dense area of chromatin and related molecules within nucleus |