How would a drug that blocks acetylcholine release affect muscle contraction?
What will be an ideal response?
A drug that blocks acetylcholine release would prevent binding of acetylcholine with its receptor on the motor end plate; therefore, sodium ions would not rush into the muscle fiber's sarcoplasm, and no action potential would be generated in the sarcolemma. As a result, muscle contraction could not occur.
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If the partial pressure of oxygen is lower in the pulmonary capillaries than in the alveolus, O2 will diffuse:
from the area of lesser concentration to the area of greater concentration out of the pulmonary capillary into the alveolus there will be no net diffusion of oxygen out of the alveolus into the pulmonary capillary none of the choices are correct
Blood moving through the aortic semilunar valve is now oxygenated blood.
a. true b. false
Because the kidneys help produce vitamin D, if the kidneys fail, the absorption of what substance would be impaired?
A. Protein B. Calcium C. Potassium D. Sodium
A hormone that helps to regulate the sodium ion content of the body is
A) cortisol. B) parathormone. C) thymosin. D) somatotropin. E) aldosterone.