How is most of the carbon dioxide transported by the blood in humans?
A) bicarbonate ions in the plasma
B) CO2 attached to hemoglobin
C) carbonic acid in the erythrocytes
D) CO2 dissolved in the plasma
E) bicarbonate attached to hemoglobin
Answer: A) bicarbonate ions in the plasma
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The internal anatomy of the brain has which structure?
A) White matter only B) White matter surrounded by gray matter C) Gray matter surrounded by white matter D) Gray matter only
A condition caused by prolonged repetitive motions of the wrist and fingers is called carpal ________ syndrome.
Fill in the blank(s) with the appropriate word(s).
Which joint is a ball-and-socket joint?
A) Atlanto-axial B) Dentoalveolar C) Glenohumeral D) Intervertebral
The average functional lifespan of an RBC is ________
A) 20-30 days B) 50-75 days C) 100-120 days D) one year E) the body's lifetime