Name the structures in the kidney that produce urine
A) collecting ducts B) nephrons
C) major and minor calyces D) afferent and efferent arterioles
Answer: B
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Sympathetic stimulation of the heart
a. increases the heart rate b. increases the heart's contractility c. shifts the Frank-Starling curve to the left d. involves the release of norepinephrine e. causes all of the above
A eukaryotic cell that receives a "go-ahead" signal at the G1 checkpoint of the cell cycle will
complete the cycle and divide. move directly into the M phase. move directly into the G2 phase. enter a resting stage. stop growing.
Why are metabolic and respiratory acidosis treated by the intravenous infusion of solutions containing sodium lactate?
A) The infused lactate ions are metabolized by the liver cells and converted to sodium ions, which help replace the depleted sodium reserves required to restore acid-base balance. B) The infused lactate ions are metabolized by the liver cells and converted to potassium ions, which help restore the depleted potassium reserves required to restore acid-base balance. C) The infused lactate ions are metabolized by the liver cells and converted to carbonic acid, which helps restore the depleted bicarbonate reserves required to restore acid-base balance. D) The infused lactate ions are metabolized by the liver cells and converted to bicarbonate ions, which help restore the depleted bicarbonate reserves required to restore acid-base balance.
Which of the following is a paired structure?
a. cerebral (mesencephalic) aqueduct b. median aperture c. central canal of spinal cord d. lateral aperture