What is the effect of curare?
A) Depresses the inspiratory neurons in the medulla oblongata
B) Changes the shape of the hemoglobin so that it cannot bind to oxygen
C) Interferes with the activation of the diaphragm and the intercostal muscles by their motor nerves
D) Inactivates acetylcholinesterase
Correct Answer:
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Q38: As plasma PCO₂ increases,
A)hemoglobin synthesis increases.
B)ventilation increases.
C)vital
Q39: Hypoventilation decreases the respiratory excretion of
A)oxygen.
B)water.
C)carbon dioxide.
D)albumin.
Q40: Intra-alveolar surface tension is caused by
A)acid.
B)mucus.
C)water.
D)bicarbonate.
Q41: Activation of the beta₂-adrenergic receptors of the
Q42: In which structure is the PO₂ 104
Q44: Which of the following events occurs last?
A)Contraction
Q45: The trachea is
A)"the problem" in asthma.
B)the site
Q46: Which of the following is most likely
Q47: The Hering-Breuer reflex
A)prevents overinflation of the lungs.
B)is
Q48: Which respiratory structure is distal to the
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