Tim runs 5 to 8 miles a day. He has an enlarged heart and low heart rate and blood
pressure. He most likely has
A) atherosclerosis.
B) an arrhythmia.
C) a very healthy cardiovascular system.
D) coronary artery disease.
C
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Sodium ions have a single positive charge. Table salt is formed by the ionic bond between sodium ions and ions of chloride. Which of the following must be true of chloride?
A. It is a free radical. B. It is a cation. C. It is non-polar. D. It is an anion. E. It is electrically neutral.
Neural tube formation occurs during which gestational age?
A) 4 months B) 2 weeks C) 1 month D) 9 weeks E) 5 months
All of the following are normal constituents of urine EXCEPT ________
A) uric acid B) urea C) creatinine D) blood
Which ions are critical for the activation of some enzymes?
A) magnesium ions B) fluorine ions C) potassium ions D) chlorine ions