quiz 1 Complete Questions And Answers
\.What are the primary functions of cells?
Transportation, ingestion, secretion, respiration, communication, and reproduction.
\.What happens to cellular structures when faced with stress or damage?
They must adapt their function to survive, which may involve changes in size, number, and
structure.
\.What are the types of adaptive cell changes?
Atrophy, hypertrophy, hyperplasia, metaplasia, and dysplasia.
\.What is acromegaly and what causes it?
Acromegaly is hyperplasia resulting from excessive growth hormone.
\.What is atrophy and what causes it?
Atrophy is a decrease in cell size caused by reduced use of tissue, insufficient nutrition, lack of
oxygen, decreased stimulation, or aging.
\.Provide an example of atrophy.
Shrinkage of skeletal muscle when a limb is immobilized in a cast.
\.What is hypertrophy?
Hypertrophy is an increase in the size of individual cells, resulting in an enlarged tissue mass.
\.Give an example of hypertrophy.
Cardiomyopathy.
\.What is hyperplasia?
Hyperplasia is an increase in the number of cells resulting in an enlarged tissue mass.
\.Provide an example of hyperplasia.
, Prostatic hyperplasia.
\.What is metaplasia?
Metaplasia is when one mature cell type is replaced by a different mature cell type.
\.What is an example of metaplasia?
Exposure to cigarette smoke.
\.What is dysplasia?
Dysplasia refers to changes in cell size, shape, uniformity, arrangement, and structure, often
with large nuclei and increased mitosis.
\.What are the characteristics of cells in dysplasia?
Large nuclei, increased mitosis, and changes in cell structure.
\.What is the difference between reversible and irreversible cellular injury?
Reversible injury allows cells to recover, while irreversible injury results in cell death.
\.What are some causes of cell injury and death?
Infection, physical injury, mechanical injury, thermal injury, chemical injury, toxins, and oxidative
stress.
\.What are free radicals?
Free radicals are molecules with an unpaired electron, making them highly unstable and
reactive.
\.What physiological processes can lead to the formation of free radicals?
Aerobic cell metabolism and fighting pathogens.
\.What is oxidative stress?
Oxidative stress occurs when there is an imbalance between free radicals and antioxidants in
the body.
\.What is the significance of cellular adaptations in response to stress?
Cellular adaptations are crucial for survival under stress, allowing cells to maintain function
despite adverse conditions.
\.What does wildly pleomorphic cells indicate in the context of dysplasia?