What is the function of the ciliated epithelium of the tracheobronchial tree?
A. To cause coughing
B. Move dirt toward the alveoli
C. A mucus-cilia escalator
D. All of the choices are correct.
Answer: C
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Patches of melanin found on the skin form ________
A) Bilirubin B) Carotene C) Melanocytes D) Freckles
Of the following muscles, which can compress the abdomen?
A) rectus abdominis B) transversus abdominis C) internal oblique D) external oblique E) All of the answers are correct.
The superior vena cava receives systemic blood draining from all areas superior to the diaphragm except the ________.
A. lungs B. left upper arm C. heart wall D. brain
Saltatory propagation differs from continuous propagation in that ________
A) saltatory propagation occurs when an action potential moves from node to node along myelinated axons B) saltatory propagation is slower than continuous propagation. C) continuous propagation occurs when an action potential moves from node to node along unmyelinated axons D) There is no difference between the two types of action potential propagation.