The condition that occurs when the lower portion of the esophagus protrudes into the thoracic cavity is
A. a peptic ulcer.
B. GERD.
C. heartburn.
D. a hiatal hernia.
Answer: D
You might also like to view...
A person slams their fingers in a door. Their fingernails are damaged near the lunula, forming large white ovals at the site of the injury. As time progresses, what happens to the damaged (white) area?
A. The white ovals will split vertically and each half will gradually move toward the lateral (horizontal) edges of the nails. B. The white ovals will gradually move upward toward the free edge of the nail and then be worn away with the free nail edge. C. The white ovals will be pushed up and out of the nail as raised bumps, with that section of nail eventually peeling off. D. The white ovals will slowly dissipate and disappear as the damage is replaced from underneath via the nail bed.
Which is NOT true about reflexes initiated by muscle spindle activation?
A. They have a monosynaptic component. B. They result in activation of alpha motor neurons. C. They result in activation of extrafusal muscle fibers. D. The "knee-jerk" reflex is an example. E. They inhibit the activation of muscles that are stretched.
Motor neurons of the _________ nervous system contain more rapidly conducting axons
A. autonomic B. somatic
Which of the following is NOT a component of DNA?
Phosphate Deoxyribose sugar Guanine Uracil