★ Cell Structure and Functions Quiz
Facilitated diffusion:
A. requires a transmembrane protein
B. requires ATP
C. can move molecules against a concentration gradient
D. is typically used to transport small nonpolar molecules
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Cartilage-producing cells occupy small cavities in cartilage called __________, while bone-producing cells occupy cavities in bone called __________.
A. lacunae; Haversian canals
B. canaliculi; Haversian canals
C. lamellae; lacunae
D. lacunae; lacunae
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