The major cation in extracellular fluid is
A) sodium.
B) potassium.
C) calcium.
D) magnesium.
E) iron.
A
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The process of gas exchange between air and blood is called ________
A) External respiration B) Ventilation C) Internal respiration D) Respiration
In sharks and rays TMAO
a. is present in a 2:1 ratio with urea. b. counteracts the toxic effect of urea. c. serves as a hyper-ionic regulator. d. two of these. e. all of these.
Select the statement that best describes the pulmonary circulation.
A. Microscopic blood vessels that allow for the exchange of nutrients in the tissues B. System of blood vessels that a carries blood from the heart to the rest of the body C. System of blood vessels that carries blood from the right ventricle of the heart to the lungs and back to the left atrium of the heart D. System of blood vessels that carries blood from the heart to the lungs and back to the right atrium of the heart