What structures are used for direct cell to cell signaling?
A. Gap junctions
B. Tight junctions
C. Desmosomes
D. Exocytosis vesicles
Answer: A
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Receptors that monitor blood pressure are called ________.
Fill in the blank(s) with the appropriate word(s).
Red blood cell production increases when
A) oxygen levels in the blood increase. B) oxygen levels in the blood decrease. C) protein levels in the blood increase. D) carbon dioxide levels in the blood decrease. E) carbon dioxide levels in the blood increase.
Which set of muscles is primarily used when doing bar chin-ups?
A) Biceps femoris muscle B) Biceps brachii muscle C) Deltoid muscle D) Triceps brachii muscle
When 2,3-bisphosphoglycerate (BPG) levels increase, hemoglobin
A. releases less oxygen to tissues. B. releases more carbon dioxide to tissues. C. releases more oxygen to tissues. D. releases less carbon dioxide to tissues. E. None of these choices is correct.