The carbonic acid-bicarbonate buffering system:
a. Causes a change in respiratory rate to maintain balance
b. Causes the secretion of sodium and chloride from the kidneys
c. Is slow to react to changes in pH
d. Reacts to changes in blood oxygen concentrations
Answer: a. Causes a change in respiratory rate to maintain balance
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The fetal blood that passes through the ductus venosus is relatively
A) low in oxygen but high in nutrients. B) high oxygen but low in nutrients. C) high in oxygen and nutrients. D) low in oxygen and nutrients.
In which condition are the lungs infected with Mycobacterium and produce fibrous nodules around the bacteria, leading to progressive pulmonary fibrosis?
A. Pneumonia B. Dyspnea C. Pneumothorax D. Rhinitis E. Tuberculosis
A chemical produced in a cell that activates specific processes in response to a hormone interaction with a membrane-bound receptor is referred to as a(n) _____
A. hormone response element B. transcription factor C. messenger RNA D. intracellular mediator
When over 10% of the body's blood has been lost, a survival response occurs involving activation of the ________ nervous system.
A. somatic B. parasympathetic C. sympathetic