Figure 24-1 the Stomach (Dissected)

question 127

Multiple Choice

Figure 24-1 The Stomach (dissected)

Use Figure 24-1 to answer the following questions:
-Identify the structure labeled "3."

• A) rugae
• B) circular muscle layer
• C) oblique muscle layer
• D) longitudinal muscle layer
• E) submucosa

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Definitions:

Actin Myofilament

Actin myofilaments are thin filaments composed of the protein actin and are essential components of the cytoskeleton and muscle contraction.

Myosin Myofilament

A type of protein filament in muscle cells responsible for muscle contraction, part of the thick filaments in myofibrils.

Sarcomere

The basic unit of a muscle's cross-striated myofibril, responsible for muscle contraction.

Fibrositis

Fibrositis, often called fibromyalgia, is a chronic condition characterized by widespread muscle pain, fatigue, and tender points on the body.