The heart is confined within a double-walled serous membrane sac. The part of the membrane that is in contact with the heart is the ________ layer.
A. serous
B. visceral
C. synovial
D. parietal
E. mesothelial
Answer: B
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A person walks into the emergency room with rapid and shallow breathing and a feeling of light-headedness. A blood test shows high levels of bicarbonate ions and a pH of 7.34. What could explain these symptoms?
A) metabolic acidosis with respiratory compensation B) acidosis with no compensation C) respiratory acidosis with renal compensation D) metabolic alkalosis with respiratory compensation E) respiratory alkalosis with renal compensation
________ refers to a group of at least 20 plasma proteins that normally circulate in an inactive state and are a major mechanism for destroying foreign substances in the body.
Fill in the blank(s) with the appropriate word(s).
Which of the following describes a trans-fat?
Has carbon-carbon single bonds Has carbon-carbon double bonds with hydrogens on opposite sides of the bonds Has carbon-carbon double bonds with hydrogens on the same side of the bonds The fatty acids form a bent chain
The gastroesophageal sphincter is normally closed to prevent
a. air from entering the esophagus during. b. gastric contents from refluxing into the esophagus. c. vomiting. d. esophageal leaking into the stomach. e. food from entering the pharynx.