The Esophagus Has Several Variations from the Standard Plan of the Gut

question 76

Multiple Choice

The esophagus has several variations from the standard plan of the gut tube. These include

• A) epithelium of mucosa is stratified squamous.
• B) epithelium of mucosa is simple columnar.
• C) muscularis externa may be striated muscle.
• D) epithelium of mucosa is stratified squamous, and muscularis externa may be striated muscle.
• E) epithelium of mucosa is simple columnar, and muscularis externa may be striated muscle.

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Definitions:

Smooth Muscle

A type of muscle found in the walls of internal organs and blood vessels, which is not under conscious control.

Cardiac Muscle

Specialized muscle tissue found only in the heart, characterized by involuntary control and the presence of intercalated discs for synchronized contraction.

Striated

Striped; marked by stripes or bands.

Spontaneous Contraction

Involuntary and automatic contraction of muscles, often referring to the muscles in various organs such as the heart.