The most important regulator of electrolyte concentrations in extracellular fluids is ________.
A) insulin
B) aldosterone
C) glucagon
D) cortisol
B) aldosterone
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Although hormones influence activity in the neural and reproductive systems, they do not influence the digestive system
Indicate whether this statement is true or false.
Individual proteins typically pass through the plasma membrane by
a. primary active transport b. symport c. vesicular transport d. secondary active transport e. facilitated diffusion
Which of the following statements concerning action potentials in the heart is correct?
a. The rising phase of the action potential in cardiac autorhythmic cells is due to a rapid Ca2+ influx. b. The rising phase of the action potential in cardiac contractile cells is due to a rapid Na+ influx. c. The plateau phase of the action potential in cardiac contractile cells is due to a slow Ca2+ influx. d. Two of these answers are correct. e. All of these answers are correct.
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