________ form the myelin sheath around axons in PNS.
A. Ependymal cells
B. Oligodendrocytes
C. Microglial cells
D. Astrocytes
E. Schwann cells
Answer: E
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Muscle cells
A) actively lengthen. B) generate compression. C) possess a mechanism that regulates the tension amount by changing the number of contracting sarcomeres. D) vary tension production based on the amount of sodium ions bound to actin. E) can only contract
__________ are small circumscribed elevations of skin containing pus
Fill in the blank(s) with correct word
Chemotaxis
A. refers to dilation of blood vessels by chemicals released by damaged tissue cells. B. refers to the chemical attraction of neutrophils to a site of inflammation. C. refers to the engulfing of microbes and foreign molecules by macrophages. D. is important only for adaptive immune responses. E. is important only for innate immune responses.
The phase of mitosis that begins as spindle fibers pull sister chromatids apart at the centromere is
A. metaphase. B. anaphase. C. interphase. D. telophase. E. prophase.