front 1 The smooth muscle action involving peristalsis primarily functions to: 1) mix food in the mouth 2) aid in urination 3) propel food from the mouth during vomiting 4) move food through the intestine | back 1 move food through the intestine |
front 2 Which of the following substances would not be able to act directly on food to cause chemical digestion? 1) pepsin 2) amylase 3) secretin 4) protease 5) brush border enzymes | back 2 secretin |
front 3 How is salivation controlled? 1) By an alkaline pH 2) By salivary hormones produced by the epithelium of the oral cavity 3) By an acidic pH 4) By the parasympathetic nervous system 5) By the sympathetic nervous system | back 3 By the parasympathetic nervous system |
front 4 Samantha was diagnosed as having gastric ulcers and her stomach contents were sent for analysis. The results showed that she did not have helicobacter pylori infection. Among the choices below, which would be a likely possibility as being the cause of the ulcer? 1) increased pepsin secretion 2) increased histamine secretion 3) increased mucus secretion 4) lack of pace maker cells | back 4 increased histamine secretion |
front 5 Which one of the following would most likely neutralize stomach acid in the intestine? 1) Secretion of bile from the liver 2) Secretion of brush border enzymes from the lining of the small intestine 3) Secretion of pancreatic amylase 4) Secretion of bicarbonate ions by the pancreas | back 5 Secretion of bicarbonate ions by the pancreas |
front 6 The main chemical activity of the stomach is to begin: 1) breakdown of food into smaller particles by churning movements 2) digestion of lipids 3) digestion of carbohydrates 4) digestion of proteins | back 6 digestion of proteins |
front 7 Which of the following statements best describes the action of CCK? 1) contraction of the gall bladder and relaxation of the hepatopancreatic sphincter 2) contraction of the gall bladder and the hepatopancreatic sphincter 3) relaxation of the gall bladder and the hepatopancreatic sphincter 4) relaxation of the gall bladder and contraction of the hepatopancreatic sphincter | back 7 contraction of the gall bladder and relaxation of the hepatopancreatic sphincter |
front 8 Mucus secreted by the stomach serves to: 1) protect the stomach from HCl acid 2) digest carbohydrates 3) digest proteins 4) protect the gall bladder | back 8 protect the stomach from HCl acid |
front 9 The stimulus for production of intestinal juice is the presence of acidic chyme in the small intestine. 1) True 2) False | back 9 True |
front 10 Which of the below organs is the primary site of nutrient absorption? 1) small intestine 2) liver 3) large intestine 4) stomach 5) pancreas | back 10 small intestine |
front 11 Brush border enzymes are produced by: 1) epithelial cells of the gastric pits 2) epithelial cells lining the villi of the small intestine 3) epithelial cells lining the crypts of Lieberkuhn 4) epithelial cells lining the colon | back 11 epithelial cells lining the villi of the small intestine |
front 12 Which of the following is NOT a characteristic of the large intestine? 1) Is divided into ascending, transverse, descending and sigmoid portions. 2) Contains bacteria that synthesize certain nutritional factors such as vitamin K and B complex. 3) Serves as the main digestive organ. 4) Absorbs much of the water remaining in the undigested chyme. | back 12 Serves as the main digestive organ. |
front 13 Gastric movements are inhibited by? 1) glucagon 2) secretin 3) gastrin 4) pepsin 5) chymotrypsin | back 13 secretin |
front 14 Chemical digestion involves: 1) enzymatic action on complex substances to break them into simpler substances 2) anabolic processes..joining together smaller molecules 3) the churning of food in the stomach 4) segmentation in the small intestine | back 14 enzymatic action on complex substances to break them into simpler substances |
front 15 Digestion of which of the following would be affected the most if the liver was severely damaged? 1) carbohydrates 2) proteins 3) lipids[fats] 4) nucleases | back 15 lipids[fats] |
front 16 Control of digestive activity is mainly through the sympathetic nervous system. 1) True 2) False | back 16 False |
front 17 Under the stimulus of _________ bile production is increased at the _____. 1) CCK, small intestine 2) secretin, liver 3) CCK, stomach 4) secretin, pancreas 5) gastrin, liver | back 17 secretin, liver |
front 18 Pepsin is produced in the __________ and initiates the chemical breakdown of ____________. 1) mouth, complex carbohydrates 2) stomach, nucleic acids 3) stomach, lipids 4) stomach, nucleic acids 5) stomach, proteins | back 18 stomach, proteins |
front 19 Brush border enzymes help digest.. 1) fats 2) carbohydrates 3) carbohydrates and proteins 4) proteins and fats 5) proteins | back 19 carbohydrates and proteins |
front 20 Which of the below substances are passively absorbed? 1) glucose, fat 2) amino acids, water 3) water, fat 4) glucose ,amino acids | back 20 water, fat |
front 21 The enzyme most responsible for acting on fat is primarily produced by the: 1) salivary glands 2) stomach 3) small intestine 4) pancreas 5) liver | back 21 pancreas |
front 22 When chyme is squirted into the duodenum, what is the normal amount that is squirted at each wave? 1) 3 ml. 2) 50 ml 3) 100 ml 4) 500 ml | back 22 3 ml. |
front 23 Chemical digestion of carbohydrates is initiated in the__________ with __________enzyme. 1) stomach, pepsin 2) mouth, trypsin 3) mouth , amylase 4) stomach, amylase 5) mouth, lipase | back 23 mouth , amylase |
front 24 Which one of the following enzymes digests proteins? 1) sucrase 2) lipase 3) amylase 4) dipeptides 5) pepsin | back 24 pepsin |
front 25 Which of the following apply to the small intestine? 1) Foods are acted on for the first time in this organ by protein splitting enzymes. 2) Most of the nutrient absorption from the digestive tract occurs here. 3) Carbohydrates and proteins but not fats are digested. 4) Bile is produced here. | back 25 Most of the nutrient absorption from the digestive tract occurs here. |
front 26 Although food does NOT pass through this structure enzymes are secreted here that are capable of digesting carbohydrates, fats, and proteins. 1) liver 2) small intestine 3) pancreas 4) large intestine 5) stomach | back 26 pancreas |
front 27 The absorbable digestion byproduct of starch is: 1) glucose 2) amino acid 3) fatty acid 4) polysaccharide 5) glycerol | back 27 glucose |
front 28 The absorbable products of protein digestion are: 1) monosaccharides 2) fatty acids 3) amino acids 4) nucleotides 5) glycerol and water | back 28 amino acids |
front 29 When aminoacids are utilized to synthesize glucose the process is called? 1) gluconeogenesis 2) glucogenolysis 3) glycogenesis 4) glycogenolysis | back 29 gluconeogenesis |
front 30 Excess glucose that is absorbed by the body is stored principally in the: 1) skeletal muscle and liver 2) adipose tissue and brain 3) gall bladder and pancreas 4) heart and brain 5) smooth muscle and liver | back 30 skeletal muscle and liver |
front 31 Which of the following substances increases in amount during cellular respiration? 1) ATP 2) oxygen 3) glucose 4) glycogen | back 31 ATP |
front 32 Anabolic metabolism includes: 1) the process of glycolysis 2) destructive processes by which substances are decomposed 3) changes of larger molecules into smaller ones 4) constructive processes by which substances are synthesized | back 32 constructive processes by which substances are synthesized |
front 33 The function of chylomicrons is to: 1) transport proteins which are broken down by digestive enzymes, to the tissues for repair of worn out cells. 2) to transport lipids in the diet to adipose tissue for storage 3) to transport lipids manufactured in the body to adipose tissue for storage 4) to transport lipids in the diet to the blood vessels for formation of plaques | back 33 to transport lipids in the diet to adipose tissue for storage |
front 34 Chemical digestion of lipids results in which products? 1) fatty and amino acids 2) water and glycerol 3) monosaccharides and peptides 4) monoglycerides and fatty acids 5) glycerol and monosaccharides | back 34 monoglycerides and fatty acids |
front 35 Which of the following is NOT an example of an anabolic reaction? 1) conversion of glucose into triglycerides 2) conversion of glycogen into glucose 3) conversion of glucose into proteins 4) conversion of amino acids into complex proteins | back 35 conversion of glycogen into glucose |