The Canal That Runs Through the Core of Each Osteon

question 35

Multiple Choice

The canal that runs through the core of each osteon (Haversian system) contains ________.

• A) cartilage and lamellae
• B) osteoclasts and osteoblasts
• C) yellow marrow and perforating, or Sharpey's, fibers
• D) blood vessels and nerve fibers
• E) red marrow

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Definitions:

Coenzymes

Substances that enhance the action of enzymes by facilitating their ability to catalyze biochemical reactions.

Acetyl Groups

Functional groups derived from acetic acid, consisting of a methyl group single-bonded to a carbonyl. The formula is CH3CO, often denoted as Ac in chemical structures.

Histone Tails

Histone tails are the N-terminal extensions of histone proteins that protrude from the nucleosome and play a key role in regulating gene expression by undergoing various chemical modifications.

Nucleosome

A basic unit of DNA packaging in eukaryotes, consisting of a segment of DNA wound around a core of histone proteins.