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Decreased extracellular K+ levels cause


A) cells to become more excitable.
B) hyperpolarization of plasma membranes.
C) more action potentials to be generated.
D) increased permeability of plasma membranes.
E) hypopolarization of plasma membranes.

F) C) and D)
G) A) and E)

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Chemicals that function to minimize changes in the pH of body fluids are called ________.


A) buffers
B) inhibitors
C) accelerators
D) activators
E) stabilizers

F) B) and E)
G) D) and E)

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Increased ADH secretion could be stimulated by which of the following situations?


A) Increased renal blood flow
B) Increased blood osmolality
C) Increased atrial natriuretic hormone production
D) Increased blood pressure
E) Decreased blood osmolality

F) C) and E)
G) A) and E)

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Stimulus for the secretion of parathyroid hormone is a decrease in serum ________ levels.


A) K+
B) Ca2+
C) calcitonin
D) phosphate
E) Na+

F) C) and D)
G) B) and E)

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The distribution of Na+ and K+ between intracellular and extracellular compartments is ________.


A) K+ mainly intracellular; Na+ mainly in extracellular
B) Na+ mainly intracellular; K+ mainly in extracellular
C) little of either intracellular but large amounts of both extracellular
D) equal amounts of both ions, in both intracellular and extracellular fluids
E) None of the choices are correct.

F) A) and E)
G) None of the above

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Synovial fluid is a part of which of the following fluid compartments?


A) Plasma
B) Interstitial
C) Intracellular
D) Extracellular
E) Cytoplasm

F) A) and E)
G) A) and D)

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In renal compensation of acidosis,


A) H+ secretion decreases; bicarbonate excretion increases.
B) H+ secretion decreases; bicarbonate reabsorption increases.
C) H+ secretion increases; bicarbonate reabsorption increases.
D) H+ secretion increases; bicarbonate excretion increases.
E) H+ secretion decreases; bicarbonate excretion decreases.

F) All of the above
G) A) and E)

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Which of the following fluid compartments contains the largest volume of water?


A) Plasma
B) Interstitial compartment
C) Intracellular compartment
D) Extracellular compartment
E) Lymph

F) A) and B)
G) B) and D)

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The predominant extracellular anion is ________.


A) protein
B) phosphate
C) bicarbonate
D) Cl−
E) Na+

F) A) and C)
G) All of the above

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