Answers
/. All types of cells undergo mitosis during formation of the embryo, "but some adult
cells, such as nerve cells, lens cells of the eye, and muscle cells, lose their ability to
replicate and divide". The cells of other tissues particularly EPITHELIAL cells ( e.g., of
the intestine, lung, skin), divide continuously and rapidly, completing the cycle in less
than 10 hrs. pg. 37 - Answer-✅cells that can and cannot replicate
/.(n.) the wasting away of a body organ or tissue; any progressive decline or failure; (v.)
to waste away
-decrease or shinkage in cellular size.
-common in skeletal muscle, heart, secondary sex organs, and the brain. pg. 50 -
Answer-✅atrophy
/.occurs with early development. pg. 50 - Answer-✅physiologic atrophy
/.occurs as a result of decreases in workload, pressure, use, blood supply, nutrition,
hormonal stimulation, and nervous stimulation. pg.50 - Answer-✅pathologic atrophy
/.-an adaptive response (muscular enlargement), occurs in the striated muscle cells of
both the heart and skeletal muscles.
-Example of cardiac hypertrophy thickened wall causing severe narrowing of aortic
valve caused by resistance of systolic ventricular emptying. "52f" pg. 52 - Answer-
✅hypertrophy
/.the enlargement of an organ or tissue because of an abnormal increase in the number
of cells in the tissues. pg. 51 - Answer-✅Hyperplasia
/.the abnormal proliferation of normal cells, usually in response to excessive hormonal
stimulation or growth factors on target cells. pg. 53 - Answer-✅pathologic hyperplasia
/.abnormal changes in the size, shape, and organization of mature cells. Also called
atypical hyperplasia. pg. 53-54 - Answer-✅dysplasia
/.-reversible replacement of on mature cell by another, sometimes less differentiated,
cell type.
-example replacement of normal columnar ciliated epithelial cells of the bronchial lining
by stratified squamous epithelial cells. pg. 54 - Answer-✅metaplasia