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Atrophy Definition and Causes

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Questions and Answers

What is the defining characteristic of metaplasia?

It is irreversible
It always leads to cancer
It is caused by genetic mutations
It involves conversion of one cell type to another (correct)

Which of the following statements about dysplasia is correct?

It leads to tissues with uniform cell size and shape
It may be a precursor of cancer (correct)
It occurs in response to acute infection
It is reversible

In the context of cellular injury, what happens in irreversible injury?

Cells reach a point of no return and progress to cell death (correct)
The injury is always reversible
Cells return to normal when the injurious agent is removed
Cell alterations regress and disappear

Which type of cellular injury involves exposure to temperature extremes like burn injuries?

Physical injury (D) Signup and view all the answers

What characteristic distinguishes compensatory mechanism in the liver after surgical removal of a portion?

Increase in functional capacity of the liver (B) Signup and view all the answers

What is the main difference between atrophy and hypertrophy?

Atrophy decreases cell size, while hypertrophy increases cell size. (D) Signup and view all the answers

Which condition may lead to pathologic atrophy?

Peripheral arterial disease (B) Signup and view all the answers

What distinguishes hyperplasia from hypertrophy?

Hyperplasia involves an increase in the size of the cell, while hypertrophy involves an increase in cell number. (C) Signup and view all the answers

In which scenario might atrophy be considered a normal process?

Atrophy following prolonged bed rest (C) Signup and view all the answers

Why does hypertrophy not occur in nerve cells?

Nerve cells lack the capacity for mitosis. (A) Signup and view all the answers