The esophagus is a muscular tube about 10 inches long that o…
The esophagus is a muscular tube about 10 inches long that originates at the pharynx (throat), travels through the neck, thoracic cavity and diaphragm to end at the stomach. Little Junior swallowed a quarter, and it is lodged in the distal (lower) esophagus. All attempts to retrieve it using endoscopy have failed, so Junior must undergo surgery to remove the foreign body will the surgery likely require an approach through the throat or stomach (i.e. is the quarter located closer to the throat or stomach?)
Read DetailsSantiago, a 12 year old boy, was awakened suddenly by a loud…
Santiago, a 12 year old boy, was awakened suddenly by a loud crash. As he sat up in bed, straining to listen, his fright was revealed by his rapid breathing (hyperventilation), a breathing pattern effective in ridding the blood of CO2. True or False: Santiago’s blood pH was becoming more acidic and triggered hyperventilation.
Read DetailsDuring labor, the ripening of the cervix is due to the press…
During labor, the ripening of the cervix is due to the pressure of the descending fetus and hormonal changes in the body. Oxytocin, a hormone that stimulates contractions, amplifies and increases the frequency of the contractions until the cervix is fully ripened and the fetus is expelled. This is an example of a [BLANK-1] feedback mechanism.
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