Portage A&P1 Module 3 Exam Questions and Answers

Portage A&P1 Module 3 Exam Questions and Answers Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might develop gastric/stomach ulcers. -Answer-Gastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess amounts would lead to erosion of the stomach lining. Explain in detail how the stomach contents enter the small intestine. -Answer-The pyloric sphincter (valve), located at the base of the stomach, relaxes causing a small quantity of chyme to pass through the opening into the first part of the small intestine. This initiates a reflex that causes the muscles of the sphincter to contract and close the opening temporarily. Then the sphincter relaxes again and allows more chyme to enter. Look carefully at the diagram below. Label the following 5 organs of the digestive system.To receive credit for the intestines you must label the specific region. 1: ___________2: ___________5: ___________6: ___________8: ___________ - Answer-1: Liver 2: Pancreas 5: Duodenum (not small intestine) 6: Ileum (not small intestine) 8: Ascending colon (not large intestine) A patient is experiencing vitamin toxicity. What type of vitamin most likely would be causing this toxicity? Explain your answer.A. Water soluble vitamin B. Fat soluble vitamin -Answer-B. Fat soluble vitamin. Fat soluble vitamins are stored within the body's fat stores making it harder for the body to rid itself of them. Explain which digestive system functions are carried out by the large intestine. -Answer- Absorption: In the large intestine water and electrolytes are reabsorbed and vitamins are absorbed. Defecation: Feces travel to the rectum where it is excreted via the anus. Note: Essay answers must clearly be in your own words. Answer the following essay question: Describe parietal cells and chief cells: name their location, secretions and purposes. - Answer-The parietal cells (located in the wall of the stomach body) secrete hydrochloric acid, generating a pH of 1.3-3.5. This very acidic pH kills many of the bacteria ingested along with food. In addition, the low pH stops the activity of salivary amylase. The secretion of hydrochloric acid is essential in the activation of pepsin