Lactose intolerance is caused by the lack of the enzyme lactase, which is normally found in the
A. lumen of the stomach.
B. membranes of cells in the small intestine.
C. endothelium of capillaries in the large intestine.
D. inside of cells in the large intestine.
E. inside of cells of the liver and gall bladder.
Answer: B
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Occlusion of blood vessels tends to lead to
A. increases in perfusion. B. increases in capillary exchange. C. inadequate blood supply and damage to body tissues. D. defibrillation of cardic muscle cell contraction.
Which of the following molecules contains polar covalent bonds?
What will be an ideal response?
What hormone tells the gallbladder to contract and release its bile through the cystic duct to the common bile duct?
A. Cholecystokinin B. Gastrin C. Secretin D. Pepsin
The functional unit of the kidney is called ________.
a)the renal hilus b)the renal corpuscle c)the nephron d)Bowman's capsule