A set of cells in the intestinal epithelium divide continually to replace dead cells lost from the surface of the intestinal lining. If you examined this continually dividing population of intestinal epithelial cells under the microscope, most of the cells would
a. be in meiosis.
b. be in mitosis.
c. be in interphase.
d. have condensed chromatin.
e. Both b and d
Ans: c. be in interphase.
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Now extinct, tooth parts of ____ are abundant as fossils dating from the early Paleozoic to the early
Mesozoic era. These jawless fishes are considered to be the earliest vertebrates with bonelike structures.
a. acanthodians b. conodonts c. osteolepiforms d. placoderms e. ostracoderms
________ links the thick filaments to the Z line
A) Troponin B) Tropomyosin C) Titin D) Nebulin E) Myomesin
Each of the following statements regarding CD95-stimulated programmed cell death is true except
A) CD95 ligand binding with CD95 receptor stimulates recruitment of adaptor proteins. B) adaptor proteins stimulate the PI3K-Akt pathway. C) recruitment to sites of receptor clustering activates initiator caspase (caspase 8) activity. D) initiator caspases proteolytically cleave executioner procaspases (procaspase 3). E) a caspase cascade results in the cleavage of many types of proteins in the target cell.
Aerobic exercises do not increase skeletal muscle size, but they do cause various changes in the body. Explain what changes aerobic exercises initiate
What will be an ideal response?