Explain the mechanism by which oxygen perfusion is increased in hypoxic muscle tissue
What will be an ideal response?
Answer: When endothelial cells experience hypoxia, levels of hypoxia-inducible factor increase and trigger the release of the hormone vascular endothelial growth factor into the walls of the blood vessels, binding specific receptors. The response is cell proliferation and the ultimate growth of blood vessels into hypoxic tissues, thereby increasing the rates of perfusion.
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a. animal name c. the surgery schedule b. client phone number d. fixed office hours
Spatial summation occurs because _____
Fill in the blank(s) with the appropriate word(s).
____ are lymph follicles in the walls of the small intestine that produce macrophages.
Fill in the blank(s) with correct word
Which embryonic layer gives rise to the lamina propria and muscularis externa?
A. Endoderm B. Gastric tube C. Mesoderm D. Ectoderm E. Neural crest