Which structure plays a critical role in countercurrent exchanger?
A) Glomerulus
B) Nephron loop
C) Vasa recta
D) Renal corpuscle
Answer: C
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Which of the following is (are) forms of contraception?
A) Chemical barriers B) Intrauterine device C) All of the above D) Rhythm method
Microglia are phagocytic cells that help move CSF within the ventricles of the brain
Indicate whether the statement is true or false
Normal alveolar PCO2 is ________.
A. 46 mm Hg B. 105 mm Hg C. 100 mm Hg D. 40 mm Hg
Detection of the frequency of a sound above 5 kHz is based upon:
A. the number of fibers discharging in cranial nerve VIII B. the phase difference between the sound waves at the two ears C. the direction of deflection of the hair cell cilia D. the location along the cochlea of the most intensely stimulated hair cells E. the frequency of action potentials in cranial nerve VIII