As the result of an asthmatic attack,
A. pulmonary blood flow is reduced while ventilation remains normal.
B. ventilation exceeds the ability of blood to pick up oxygen.
C. the surface area available for gas exchange increases.
D. bronchioles dilate.
E. ventilation is inadequate to oxygenate blood.
Answer: E
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A) conserving H+ and excreting bicarbonate ion B) excreting H+ and bicarbonate ion C) conserving H+ and bicarbonate ion D) conserving bicarbonate ion and excreting H+
Ingestion of large amounts of K+ triggers reflexes to limit the amount of K+ reabsorbed by the cortical collecting ducts
Indicate whether the statement is true or false.
Which answer choice lists the correct order of a reflex arc?
A. Receptor, afferent neuron, integrating center, efferent neuron, effector B. Receptor, afferent neuron, efferent neuron, effector, integrating center C. Effector, afferent neuron, integrating center, efferent neuron, receptor D. Receptor, efferent neuron, integrating center, afferent neuron, effector
Which nitrogenous base is unique to RNA molecules?
A) uracil B) cytosine C) adenine D) guanine E) thymine