During quiet expiration,
A.
thoracic cavity volume decreases.
B.
the diaphragm and external intercostal muscles contract.
C.
inspiratory neurons in the VRG spontaneously depolarize.
D.
air moves from the atmosphere to the alveoli.
A
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Which of the following statements regarding pyelonephritis is correct?
A) Untreated pyelonephritis typically heals spontaneously. B) Most cases of pyelonephritis occur in the lower urinary tract. C) Pyelonephritis is an inflammation of the linings of the kidney. D) In pyelonephritis, the ureters become inflamed and infected.
What is the space within the meninges of the spinal cord that contains the cerebrospinal fluid?
A) epidural space B) subdural space C) subarachnoid space D) pia mater
Which is NOT true about the countercurrent multiplier system of the kidney?
A. It creates a hyperosmolar medullary interstitium that allows the kidneys to form hypertonic urine. B. The descending loop of Henle is permeable to water. C. There is active transport of sodium and chloride out of the ascending limb of the loop of Henle. D. The ascending loop of Henle is not permeable to water. E. The fraction of filtered NaCl reabsorbed from the ascending limb equals the fraction of filtered water reabsorbed from the descending limb.