QuestionJune 29, 2025

A 22-year-old male bodybuilder was taken to the emergency room 3 months ago for breaking his arm trying to lift his car. X-ray confirmed a closed transverse fracture of his ulna and radius. His arm was placed in a cast for immobilization during the tissue repair process. When his cast comes off 3 months later, he is surprised at how his arm looks. Which type of adaptive changes occurred to his muscles during the healing period? Select one A. Hyperplasia B. Atrophy C. Hypertrophy D. Dysplasia

A 22-year-old male bodybuilder was taken to the emergency room 3 months ago for breaking his arm trying to lift his car. X-ray confirmed a closed transverse fracture of his ulna and radius. His arm was placed in a cast for immobilization during the tissue repair process. When his cast comes off 3 months later, he is surprised at how his arm looks. Which type of adaptive changes occurred to his muscles during the healing period? Select one A. Hyperplasia B. Atrophy C. Hypertrophy D. Dysplasia
A 22-year-old male bodybuilder was taken to the emergency room 3 months ago for breaking his arm trying to lift his car. X-ray confirmed a closed transverse fracture of his ulna and radius. His arm was placed in a cast for immobilization during the tissue repair process. When his cast comes off 3 months later, he is surprised at how his arm looks. Which type of adaptive changes occurred to his muscles during the healing period? Select one A. Hyperplasia B. Atrophy C. Hypertrophy D. Dysplasia

Solution
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Answer

B. Atrophy Explanation 1. Identify the condition The arm was immobilized for 3 months, leading to reduced muscle use. 2. Determine the adaptive change Reduced use of muscles typically leads to a decrease in muscle size and strength. 3. Select the correct type of adaptive change **Atrophy** is the decrease in size of a body part, cell, organ, or tissue, often due to disuse.

Explanation

1. Identify the condition<br /> The arm was immobilized for 3 months, leading to reduced muscle use.<br /><br />2. Determine the adaptive change<br /> Reduced use of muscles typically leads to a decrease in muscle size and strength.<br /><br />3. Select the correct type of adaptive change<br /> **Atrophy** is the decrease in size of a body part, cell, organ, or tissue, often due to disuse.
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