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Questions and Answers
What is atrophy?
What is atrophy?
- An increase in the number of cells
- A change from one type of cell to another
- An increase in the size of individual cells
- A reduction in the size and number of cells (correct)
Which process involves an increase in the number of cells?
Which process involves an increase in the number of cells?
- Hyperplasia (correct)
- Hypertrophy
- Metaplasia
- Dysplasia
What does metaplasia involve?
What does metaplasia involve?
- Disturbed and abnormal cell development
- An increase in the number of cells
- A change from one type of cell to another type (correct)
- An actual increase in cell numbers
Which condition may progress to the formation of a tumor?
Which condition may progress to the formation of a tumor?
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What is atrophy a reduction in?
What is atrophy a reduction in?
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When do cells increase their size or number to accomplish more work?
When do cells increase their size or number to accomplish more work?
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What distinguishes hypertrophy from hyperplasia?
What distinguishes hypertrophy from hyperplasia?
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In which condition do cells change to a type better suited for adverse conditions?
In which condition do cells change to a type better suited for adverse conditions?
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Study Notes
Atrophy
- Atrophy refers to the reduction in size or mass of cellular structures, which can occur in tissues and organs.
- Can be caused by factors like decreased workload, loss of innervation, inadequate nutrition, or reduced blood supply.
Hyperplasia
- Hyperplasia involves an increase in the number of cells in a tissue or organ, often in response to a stimulus, allowing for enhanced function or growth.
Metaplasia
- Metaplasia involves the transformation of one differentiated cell type to another, often as an adaptive response to chronic irritation or injury.
Tumor Formation
- Dysplasia is a condition where cells undergo abnormal changes, which may progress to the formation of tumors, indicating potential malignancy.
Hypertrophy
- Hypertrophy is characterized by an increase in the size of individual cells, allowing tissues to perform more work without changing the number of cells.
Differences between Hypertrophy and Hyperplasia
- Hypertrophy increases cell size, while hyperplasia increases cell number; these processes can occur simultaneously in certain physiological conditions.
Adverse Conditions and Cellular Changes
- In adverse conditions, cells may undergo metaplasia to change into a type that is better suited to survive and thrive under stress or injury.
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