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Questions and Answers
What is atrophy?
What is atrophy?
Which process involves an increase in the number of cells?
Which process involves an increase in the number of cells?
What does metaplasia involve?
What does metaplasia involve?
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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Description
Learn about the reduction in size and number of cells in atrophy, increase in cell size in hypertrophy, and increase in cell numbers in hyperplasia. Explore how cells adapt to different stimuli and conditions.
