The drug colestipol binds bile salts in the intestine, forming complexes that cannot be absorbed. How would this drug affect cholesterol levels in blood?
Colestipol would lead to a decrease in the plasma levels of cholesterol. Since the bile salts are bound they are not available for reabsorption in the large intestine and recycling to cholesterol in the liver and so will be lost in the feces. This deprives the body of a major source of cholesterol and the loss will need to be made up by increased liver synthesis. Overall, a drop in circulating cholesterol will result.
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Which send blood to either esophageal arteries or esophageal branches to supply the esophagus with blood?
A. Thoracic aorta B. Bronchial arteries and left gastric artery C. Thoracic aorta and left gastric artery D. Bronchial arteries E. Left gastric artery
Prostaglandins play a role in ________.
A) skeletal muscle contraction B) control of blood volume C) noninflammatory responses D) control of blood pressure
The heart pumps about ____ liters of blood a day and contracts about _____ times in a
lifetime. A) 3,000 liters; 2 billion B) 1,200 liters; 2 billion C) 7,000 liters; 2.5 billion D) 1,000 liters; 1 billion
Unlike females, males produce gametes throughout life due to the presence of ___ in their seminiferous tubules.
A. type A daughter cells B. primary spermatocytes C. spermatozoa D. spermatogonia