Bile is produced by the liver and stored in the gallbladder. The function of bile is to
A) prevent regurgitation of food into the esophagus and activate stomach acids.
B) lower the pH of the stomach.
C) dissolve salts and detoxify poisons in food.
D) raise the pH of chyme as it enters the small intestine.
E) disperse fats into smaller particles.
E
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Postmenopausal women are often advised to take the mineral ________ as a supplement to their diet in order to prevent bone loss due to osteoporosis
Fill in the blank(s) with correct word
Nitrogen (N) normally forms three covalent bonds with a valence of 5. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of 1). What do you predict to be the charge on ammonium?
A) +1 B) -1 C) +2 D) -2
Carbon, which has four electrons in its outer shell ( with a capacity of eight electrons), can form a maximum of how many covalent bonds with other atoms?
A.) 8 B.) 2 C.) 0 D.) 4
Which of the following statements about the angiosperm embryo sac is false?
A. It is the gametophyte generation of the plant. B. The embryo sac nuclei are the product of mitotic division of a megaspore. C. The synergids flank the egg cell. D. It contains eight nuclei. E. The nuclei within the embryo sac are diploid.