Why would improper circulation of synovial fluid cause degeneration of articular cartilages in the affected joint?
What will be an ideal response?
Articular cartilage lacks a blood supply and thus relies on synovial fluid to supply nutrients and remove wastes. If the circulation of synovial fluid were impaired, the cartilage would no longer receive nutrients, and wastes would accumulate. This could cause the cartilage to degenerate, and cells in the tissue may die.
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Which of the following molecules is responsible for "runner's high," a good feeling that accompanies long-distance running?
A. Dopamine B. Epinephrine C. Endorphin D. Acetylcholine
When an allergen binds with IgE antibodies on mast cells, resulting in release of chemical mediators, this reaction is called...
A) cytotoxic hypersensitivity. B) immune complex hypersensitivity. C) type I hypersensitivity. D) type IV hypersensitivity
The enteric plexus is composed of the ________ and the ________.
A. submucosal plexus; colonic plexus B. submucosal plexus; myenteric plexus C. colonic plexus; pancreatic plexus D. submucosal plexus; pancreatic portal E. myenteric plexus; pancreatic portal
Increased levels of carbon dioxide in the blood will result in
A) decreased blood flow to the lungs. B) decreased parasympathetic stimulation of the heart. C) decreased cardiac output. D) decreased heart rate. E) All of the answers are correct.