Which of the following structures is considered part of the lower respiratory tract?
A. Nose
B. Lungs
C. Pharynx
D. Larynx
Answer: B
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The negative feedback system is much more common than the positive feedback system.
Answer the following statement true (T) or false (F)
If bile ducts are blocked,
A) more bilirubin appears in the plasma. B) bilirubin appears in the saliva. C) more hemolysis takes place. D) more red blood cells are produced. E) more white blood cells are produced.
Why is otitis media more common in children than in adults?
A. Children have shorter, more horizontal auditory tubes. B. Children have longer, more slanted auditory canals. C. Children have small openings in the tympanic membrane that allow introduction of bacteria. D. Children are more frequently exposed to pathogens that cause ear infections. E. Children have smaller, more flexible middle ear bones.
Action potentials are conducted more rapidly when transmission is
A. from internode to node on a myelinated axon. B. from internode to internode. C. on a small diameter axon. D. on an unmyelinated axon. E. from node to node on a myelinated axon.