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Chap 17 Digestion
Chap 17 Study Guide and True False
Question | Answer |
---|---|
What are the 4 layers within the walls of the ailimentary canal? | 1. Mucosa 2. Submucosa 3. Muscular and 4. Serosa |
What is in a root canal of a tooth? | blood vessels and nerves |
The salivary enzyme amylase functions to digest what? | splits starch and glycogen molecules into disaccharides |
What is the main part of the stomach called? | the body |
Parietel cells of gastric glands secrete what? | hydrochloric acid and intrinsic factor |
Gastrin is secreted by the stomach, what is it's function? | it is a peptide hormone that increases the secretory activity of gastric glands |
Function of the hormone called secretin? | A PEPTIDE HORMONE, STIMULATES THE PANCREAS TO SECRETE PANCREATIC JUICE—HIGH IN CARBOHYDRATES |
What is the protein-splitting enzyme found in pancreatic juice? | TRYPSIN, CHYMOTRYPSIN, CARBOXYPEPTIDASE |
Constituent of bile has a digestive function? | BILE SALTS |
Where does Peristalsis occur in the digestive tract? | FROM PHARYNX TO ANUS |
Digestion of which of the following would be affected the most if the liver were severely damaged? | LIPIDS |
What is the compostion of the greater omentum? | A FILMY, DOUBLE-FOLD PERITONEAL MEMBRANE |
What are the effects of sympathetic nerve impulses on the alimentary canal and parasympathetic impulses? | SYMPATHETIC-INCREASES…PARASYMPATHETIC-RELAXES |
The bile canals of the liver unite to form what? | THE HEPATIC DUCT (IT LATER JOINS CYSTIC DUCT FROM GALL BLADDER TO FORM COMMON BILE DUCT) |
What is a function of the large intestine? | ABSORPTION OF ELECTROLYTES AND WATER |
Mixing in the small intestine is accomplished by what type of movement? | Segmentation |
Which teeth are best adapted for biting off relatively large pieces of food? | the INCISORS |
One of the major functions of the large intestine? | TO REABSORB WATER FROM CHYME |
Gastric and duodenal ulcers are usually caused by the action of what? | PEPSIN |
Jaundice, which is characterized by a yellowish tinge to the tissues, is due to an increased blood concentration of what? | BILE PIGMENTS |
What are the liver functions? | stores and produces glycogen from glucose, breaks down glycogen into glucose, converts non-carbs to glucose, converts carbs and proteins into fats, produces and secretes bile, synthesizes lipids, proteins and cholesterol and removes toxins from blood |
How do bile salts act like detergents? | by reducing surface tension and breaking down fat globules into droplets—process called EMULSIFICATION |
What and where are Peyer’s patches? | LYMPH NODES IN THE ILEUM OF THE SMALL INTESTINE |
TRUE OR FALSE Organs of the ailimentary canal are innervated by sympathetic as well as by parasympathetic nerve fibers? | TRUE |
TRUE OR FALSE The chamber of the mouth between the tongue and the palate is called the vestibule? | FALSE...it's the ORAL CAVITY |
TRUE OR FALSE we normally have 20 primary teeth and 32 secondary teeth? | TRUE |
TRUE OR FALSE The pyloric sphincter serves as a valve that controls the movement of food between the stomach and esopagus? | FALSE...between the STOMACH and the DUODENUM |
TRUE OR FALSE Fatty foods tend to remain in the stomach longer than protein or carbs? | TRUE |
TRUE OR FALSE Fat molecules with longer chains of carbon atoms tend to be transported away from the intestine by lymph? | TRUE |
TRUE OR FALSE The gallbladder is connected to the common bile duct by the hepatic duct? | FALSE...the LIVER is connected by the hepatic duct...and...the GALLBLADDER is connected by the CYSTIC DUCT |
TRUE OR FALSE The cecum is located at the inferior end of the descending colon? | FALSE...it's the ASCENDING COLON |
TRUE OR FALSE Pancreatic acinar cells secrete pancreatic juice? | TRUE |
TRUE OR FALSE The esophagus provides a passageway for the substances from the larnyx to the bronchi? | FALSE...it's from the PHARYNX to the STOMACH |
TRUE OR FALSE Peristalsis is defined as a mixing movement that results in food in small segments of the ailimentary canal being mixed with digestive enzymes? | TRUE |
TRUE OR FALSE The parotid gland differs from the submandibular and sublingual glands in that it secretes a clear fluid that is rich in amylase? | TRUE |
TRUE OR FALSE The stomach is C-shaped and extends from the duodenum to the spleen? | FALSE...it is J-SHAPED and extends from the ESOPHAGUS to the SMALL INTESTINE |
TRUE OR FALSE Bile is composed of HCL, pepsin, mucus and intrinsic factor? | FALSE...it is composed of WATER, BILE SALTS, BILE PIGMENTS, CHOLESTEROL and ELECTROLYTES |
TRUE OR FALSE Cholecystokinin, a hormone released from intestinal mucosa by the presence of fats, stimulates the gallbladder to contract and release bile into the duodenum? | TRUE |
TRUE OR FALSE Bile salts function as digestive enzymes to break down fatty acids? | TRUE |
TRUE OR FALSE Food passing through the stomach through the small intestine would first pass into duodenum, then the jejunum and lastly the ileum? | TRUE |
TRUE OR FALSE The movement of chyme through the small intestine is increased by parasympathetic impulses and is inhibited by sympathetic impulses? | TRUE |
TRUE OR FALSE The enterogastric reflex begins in the stomach and ends in the small intestine? | FALSE...it begins in the SMALL INTESTINE and ends in the STOMACH (flip-flop) |
What are the 6 functions of the Digestive System? | 1. Ingestion 2. mechanical digestion 3. chemical digestion 4. propulsion 5. absorption and 6. defecation |
Name the 3 parts of the pharynx? | 1. Nasopharynx 2. Oropharynx 3. Laryngopharynx |
Name the 3 salivary glands? | 1. Parotid 2. Submandibular 3. Sublingual |
Name the sphincters on top of stomach and bottom? | TOP: lower esophageal sphincter and BOTTOM: pyloric sphincter |
What's the difference between pepsin and pepsinogen? | PEPSINOGEN in the in-active form of pepsin and PEPSIN is the active form from pepsinogen in the presence of HCl |
Explain the 3 phases of gastric secretion--CEPHALIC, GASTRIC and INTESTINAL? | CEPHALIC is triggered by smell or thought of food, GASTRIC is triggered by food in stomach and INTESTINAL is triggered by movement into small intestine |
Name the 4 colons of the large intestine? | 1. ascending colon 2. transverse colon 3. descending colon and 4. sigmoid colon |
What are the life-span changes in digestion? | teeth become sensitive and gums recede, teeth loosen or fall out, heartburn and constipation more frequent and nutrient absorption decreases |