41.The digestive tract is essentially a muscular tube that runs from mouth to anus. T/F 42.Elimination of feces is the end of the digestive process. T/F 43.The digestive tract only utilizes smooth muscle. T/F 44.The presence of food is the stimulus for voluntary digestive movements. T/F
45.Mastication is controlled by voluntary stimulus of skeletal muscles. T/F 46.Swallowing is a completely voluntary reflex. T/F 47.Smooth muscle is regulated by all of the following except conscious movement of skeletal muscles.hormonal feedback loops.neural feedback loops.none of these. 48.Distention stimulates voluntary reflexes. long reflexes. local reflexes. both long and local reflexes. 49.The second stage of deglutition is voluntary involuntary esophageal. involuntary pharyngeal. all of these. 50.Peristalsis is a voluntary reflex. a long reflex a local reflex. none of these. 51.Nucleic acids are digested in the small intestine. T/F 52.DNA digestion begins with the introduction of nucleases from the pancreas in the duodenum. T/F 53.Nucleotides are absorbed whole through the intestinal villus. T/F 54.The breakdown products of nucleic acid digestion are taken into cells via active or secondary active transport. T/F 55.Transport proteins are required for entry of the production of RNA digestion into the bloodstream. T/F 56.Nucleotide degradation ends after the breakdown products enter the bloodstream. T/F 57.Which of the following are not involved in nucleic acid breakdown? 58.Which of the following are not involved in nucleotide breakdown at the brush border?
phosphatase nucleosidase deoxyribonuclease all of these 59.Absorption of nucleic acid digestion occurs at all of the following except the jejunum. the duodenum. the liver the colon. 60.Nucleic acids are absorbed as nitrogenous bases pentose sugars. phosphate ions. all of these. 61.Protein digestion begins in the stomach and ends in the small intestine. T/F
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