Quiz Details
QZ-20260505-77618
Topics:
cellular adaptations (usmle step 1)
Difficulty:
Level 3 - Medium
Questions:
5
Language:
English (English)
Generated:
May 05, 2026 at 06:57 AM
Generated by:
Guest User
Instructions: Select an answer for each question and click "Check Answer" to see if you're correct. Then view the explanation to learn more!
1 What is the primary mechanism of hypertrophy in cardiac muscle cells in response to chronic pressure overload?
Correct Answer:
C
Explanation: Hypertrophy in cardiac muscle cells occurs primarily through increased protein synthesis, leading to an increase in the size of the individual cells to handle the increased workload from chronic pressure overload.
Explanation: Hypertrophy in cardiac muscle cells occurs primarily through increased protein synthesis, leading to an increase in the size of the individual cells to handle the increased workload from chronic pressure overload.
2 Which cellular adaptation involves a decrease in cell size and can occur in response to decreased workload or loss of innervation?
Correct Answer:
C
Explanation: Atrophy is the process where cells decrease in size due to reduced workload, loss of innervation, or insufficient nutrients, leading to a decrease in function.
Explanation: Atrophy is the process where cells decrease in size due to reduced workload, loss of innervation, or insufficient nutrients, leading to a decrease in function.
3 In which type of cellular adaptation does one differentiated cell type replace another, often due to chronic irritation or inflammation?
Correct Answer:
A
Explanation: Metaplasia is the process where one differentiated cell type is replaced by another, often as an adaptive response to chronic irritation or inflammation, such as in the respiratory epithelium of smokers.
Explanation: Metaplasia is the process where one differentiated cell type is replaced by another, often as an adaptive response to chronic irritation or inflammation, such as in the respiratory epithelium of smokers.
4 What type of cellular adaptation is characterized by an increase in the number of cells, typically in response to increased demand?
Correct Answer:
B
Explanation: Hyperplasia is characterized by an increase in the number of cells in a tissue or organ, often in response to increased physiological demand, such as in the enlargement of the prostate gland.
Explanation: Hyperplasia is characterized by an increase in the number of cells in a tissue or organ, often in response to increased physiological demand, such as in the enlargement of the prostate gland.
5 Which of the following is NOT a common cause of cellular injury that can lead to adaptations?
Correct Answer:
D
Explanation: Normal aging is not considered a direct cause of cellular injury leading to adaptations. Instead, it is a natural process, whereas hypoxia, infections, and chemical exposure can directly cause cellular damage and necessitate adaptations.
Explanation: Normal aging is not considered a direct cause of cellular injury leading to adaptations. Instead, it is a natural process, whereas hypoxia, infections, and chemical exposure can directly cause cellular damage and necessitate adaptations.