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There are four basic layers of the digestive tract. Arrange them in order from the lumen (deep to superficial).
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Which part of the tooth bears the force of chewing?
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Digestive System
| Question | Answer |
|---|---|
| There are four basic layers of the digestive tract. Arrange them in order from the lumen (deep to superficial). | mucosa, submucosa, muscularis externa, and serosa |
| Which part of the tooth bears the force of chewing? | enamel |
| The small intestine is specialized for absorption. The absorptive effectiveness is enhanced by increasing the surface area of the intestinal wall. Which of the following accomplish this task? | plicae circularis and intestinal villi |
| Which two types of secretory cells make up the salivary glands? | serous cells and mucous cells |
| The stomach stores and mechanically breaks down food. In addition, the stomach also ____________________. | initiates protein digestion |
| The functions of the digestive system include: | 1. Absorbing nutrients 2. Ingesting food 3. Moving food through the digestive tract 4. Forming and eliminating waste 5. Digesting food |
| The digestive tract is a muscular tube extending from the ___________ to the __________. | Mouth; anus |
| The accessory organs of the digestive tract include: | 1. teeth 2. pancreas 3. liver 4. gallbladder |
| List the following tissue layers of the digestive tract in order as they occur from the lumen to the most external layer: 1. serosa, 2. mucosa, 3. muscularis externa, 4. submucosa | 2, 4, 3, 1 |
| There are ___ primary teeth. | 20 |
| Surgical cutting of the lingual frenulum would occur in which part of the body? | tongue |
| The largest salivary gland, which is located just anterior to each ear, is the ____________________. | Parotid gland |
| The crown of a tooth is covered by _______________, the hardest substance in the body. | Enamel |
| The pharynx is divided into __________ anatomical regions. | 3 |
| What part of the alimentary canal carries food to the stomach? | esophagus |
| How many layers make up the esophagus? | four |
| The most superior region of the pharynx that has only respiratory functions is the ________________. | Nasopharynx |
| Which structure closes to seal off the larynx during swallowing? | Epiglottis |
| The muscular tube that connects the pharynx to the stomach is the _______________. | Esophagus |
| _______________________ is a condition that occurs when the contents of the stomach are regurgitated into the esophagus. | Acid reflux, or gastroesophageal reflux disease (GERD) |
| The contents of the stomach are normally sequestered in the stomach by the _________________________. | Lower esophageal sphincter |
| Chyme is created in the _____________. | stomach |
| What secretory cells of the stomach secrete hydrochloric acid? | parietal cells |
| Pepsinogen, a digestive enzyme, is secreted by which cells of the stomach? | chief cells |
| are gastric glands | chief cells |
| The regions of the stomach include: | 1. body 2. fundus 3. cardia |
| The sphincter that regulates the movement of chyme from the stomach into the duodenum is the ___________________. | Pyloric sphincter |
| The folds of the inner stomach lining that allow the stomach to expand are called _____________. | Rugae |
| The fatty apron that extends from the greater curvature, which is part of the serosal layer of the stomach, is called the ___________. | Greater omentum |
| The last portion of the small intestine is the ____________. | ileum |
| If an incision had to be made in the small intestine to remove an obstruction, the first layer of tissue to be cut is the . | serosa |
| Sheets of serous membrane that hold the digestive tract in place are the _____________________. | mesenteries |
| All of the following secrete substances into the duodenum EXCEPT _____________. | salivary glands |
| The small intestine is specialized for _____________________. | absorption |
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jlope211
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