The anions in highest concentration in the extracellular fluid are
A) sodium, chloride, and bicarbonate.
B) sodium, potassium, and bicarbonate.
C) sodium, potassium, and chloride.
D) proteins, bicarbonate, and chloride.
E) sodium, potassium, and phosphate.
D
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The antigen-antibody reaction is an example of the regulation function of blood
Indicate whether this statement is true or false.
Blood moves into and then out of a heart chamber because
A. it moves along its pressure gradient, and that gradient depends on contraction and relaxation during the cardiac cycle. B. it is under constant pressure, but its movement is dictated by the control of valve openings and closures. C. the veins and arteries constrict and dilate to propel and attract blood. D. All of the choices are correct.
Visceral pain that is sometimes felt in more superficial areas of the body is called
A) nociceptive pain. B) referred pain. C) slow pain. D) fast pain. E) All of the answers are correct.
When these ligaments or folds come together, they prevent food from entering the lower respiratory tract
A. vocal folds B. vestibular folds C. cricothyroid ligaments D. epiglottic folds E. vocal folds and vestibular folds