Key Terms in Cells

active transport,

cell,

cell theory,

cell wall,

central vacuole,

chloroplast,

cholesterol,

chromatin,

cilium (pl. cilia),

cytoplasm,

cytoskeleton,

cytosol,

desmosome,

diffusion,

endocytosis,

endomembrane system,

endosymbiosis theory,

enzymatic protein,

eukaryote,

eukaryotic cell,

exocytosis,

facilitated diffusion,

flagellum (pl. flagella),

fluid mosaic,

gap junction,

glycerol,

Golgi apparatus,

hydrophilic,

hydrophobic,

hypertonic,

hypotonic,

intermediate filaments,

intermembrane space,

invagination,

isotonic,

lysosome,

membrane enzymes,

microfilaments,

microtubules,

mitochondrial matrix,

mitochondrion (pl. mitochondria),

nonpolar,

nuclear membrane,

nucleolus,

nucleus,

organelle,

osmosis,

passive transport,

phagocytosis,

phospholipid,

phospholipid bilayer,

pilus (pl. pili),

pinocytosis,

plasma membrane,

plasmodesma (pl. plasmodesmata),

polar,

primary active transport,

prokaryote,

prokaryotic cell,

receptor protein,

receptor-mediated endocytosis,

recognition protein,

ribosome,

rough endoplasmic reticulum (rough ER),

secondary active transport,

simple diffusion,

smooth endoplasmic reticulum (smooth ER),

solute,

solvent,

stroma,

surface protein,

thylakoid,

tight junction,

tonicity,

transmembrane protein,

transport protein,

turgor pressure,

vacuole (central),

ABOUT THE CHAPTER OPENING PHOTO

The hummingbird egg weighs just 0.02 ounce, while the egg of the elephant bird (extinct) has a volume of 2 gallons.

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