A functional group is best described as reoccurring clusters of
A) elements that occur in a salt.
B) atoms that greatly influence the chemical properties of molecules they are part of.
C) atoms that function in the body.
D) elements that form at high pH.
E) amino acids in a globular protein.
Answer: B
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Enzymes are necessary for digestion; ________ is produced to break down fats.
A. nuclease B. lipase C. carbohydrase D. maltase
Which of the following statements is FALSE?
Nutrient reabsorption occurs primarily at the proximal convoluted tubule. The nephron loop regulates the amount of water lost in the urine. Filtration occurs exclusively in the renal corpuscle, across the glomerular walls. Active secretion occurs primarily in the collecting duct.
A plane that divides the body into superior and inferior parts is known as a:
A) sagittal plane. B) transverse (horizontal, or cross) plane. C) frontal (coronal) plane. D) midsagittal (median) plane.
Acid reflux into the esophagus ("heartburn") is normally prevented by ________
A) pharyngeal and buccal sphincters B) esophageal glands C) the lower esophageal sphincter (LES) D) the upper esophageal sphincter E) pharyngeal constrictors