#1
Which cellular adaptation occurs in response to increased workload?
Hypertrophy
ExplanationIncrease in cell size leading to organ enlargement due to increased demand or stress.
#2
Which cellular adaptation is associated with a decrease in the size and function of the thymus with aging?
Atrophy
ExplanationAge-related reduction in the size and function of the thymus, a form of atrophy.
#3
Which cellular adaptation is associated with an increase in the size of individual cells?
Hypertrophy
ExplanationIncrease in the size of individual cells, leading to organ enlargement.
#4
Which cellular adaptation involves a decrease in the size of individual cells?
Atrophy
ExplanationReduction in the size of individual cells, leading to a decrease in organ size.
#5
In which scenario does metaplasia commonly occur?
Smoking-related lung changes
ExplanationTransformation of one mature cell type to another, often seen in response to chronic irritation, as in smoking-related lung changes.
#6
What is the term for a reversible change in which one adult cell type is replaced by another?
Metaplasia
ExplanationReversible change where one differentiated cell type is replaced by another, adapting to the altered environment.
#7
Which of the following is an example of physiologic hyperplasia?
Liver regeneration after partial hepatectomy
ExplanationIncrease in cell number in response to normal physiological stimuli, such as liver regeneration after partial hepatectomy.
#8
What is the primary cause of pathologic atrophy in organs and tissues?
Decreased workload
ExplanationPathologic reduction in cell and organ size due to decreased workload or use, often associated with disuse or impaired blood supply.
#9
What is the primary stimulus for physiologic hypertrophy in the heart?
Increased workload
ExplanationNormal increase in heart size in response to increased workload, such as during exercise.
#10
Which cellular adaptation is reversible and can return the tissue to normal if the stimulus is removed?
Hyperplasia
ExplanationReversible increase in cell number, potentially returning the tissue to normal if the triggering stimulus is eliminated.
#11
Which of the following is an example of pathologic hyperplasia?
Thymic atrophy with aging
ExplanationAbnormal increase in cell number leading to thymic atrophy, a form of pathologic hyperplasia.
#12
Which cellular adaptation involves an increase in the number of cells resulting in an organ enlargement?
Hyperplasia
ExplanationIncrease in cell number leading to enlargement of an organ, often in response to increased physiological demand.
#13
What is the term for a decrease in the size of cells and organ size due to a decrease in workload or use?
Atrophy
ExplanationReduction in cell size and organ size due to decreased workload or use.
#14
In which type of cellular adaptation does the cell size remain unchanged, but there is a change in the cell type?
Metaplasia
ExplanationCell type transformation without a change in cell size, often seen in response to chronic irritation or inflammation.
#15
What is the characteristic feature of dystrophic calcification?
Calcium deposition in injured or dying tissues
ExplanationAccumulation of calcium in injured or dying tissues, distinct from metastatic calcification.
#16
Which cellular adaptation is often associated with Barrett's esophagus?
Metaplasia
ExplanationTransformation of the esophageal lining cells in response to chronic irritation, leading to Barrett's esophagus.
#17
In which scenario does hyperplasia commonly occur in the human body?
Liver regeneration after partial hepatectomy
ExplanationIncrease in cell number in response to a physiological stimulus, such as liver regeneration after partial hepatectomy.
#18
What is the primary mechanism underlying pathologic hypertrophy of the heart?
Increased workload
ExplanationAbnormal increase in heart size due to sustained increased workload, often associated with cardiovascular conditions.