Lab 3 - Digestive System

Lab 3 - Digestive System Questions and Answers 2023 List the 5 stages of digestion. Ans- Ingestion, Digestion, Absorption, Compaction, Defecation True or False: The esophagus is considered a primary organ of the GI tract. Ans- True True or False: The tongue is considered a primary organ of the GI tract. Ans- False True or False: Mechanical digestion in the mouth is carried out by way of salivary amylase. Ans- False, mechanical digestion in the mouth is carried out by the teeth. What is the function of the structure pictured above specified by the pointer? (epiglottis) Ans- The function of the epiglottis, which is pictured above, is to prevent food from entering the airway upon swallowing. Identify the structure in the picture above, specified by the pointer, then describe its relationship to the trachea using anatomical terminology. (esophagus) Ans- The esophagus, pictured above, runs posteriorly to the trachea. Identify the sphincter pictured above (specified by the arrow and highlighted in blue) and describe its function. (pyloric sphincter) Ans- The pyloric sphincter regulates the passage of food from the stomach to the small intestine. It keeps food from flowing back into the stomach. Identify the structure in the above picture, specified by the arrow, and describe its function. (rugae) Ans- Gastric rugae increase surface area of the stomach allowing it to expand when food enters. Which of the following statements is FALSE regarding the structure pictured above, specified by the pointer. (small intestine) Each segment is a collection of fecal material. This structure increases surface area to allow for nutrient absorption. All of the above statements are false. Ans- Each segment is a collection of fecal material. Identify the membranous structure pictured above, specified by the pointer, and describe its function. (mesentery) Ans- The mesentery, pictured above, anchors the small intestine to the abdominal cavity keeping it from twisting. Identify the structure pictured above, specified by the pointer. Ans- The large intestine or the colon Identify the specific structure pictured above, specified by the pointer. Ans- The ascending colon Which of the following statements is TRUE regarding the structure pictured above, specified by the pointer? (large intestine) Each segment is a collection of fecal material. This structure can be found in the small intestine and increases surface area to allow for nutrient absorption. All of the above statements are false. Ans- Each segment is a collection of fecal material. Which of the following statements is TRUE regarding the teeth? The canine teeth are specialized for crushing and grinding food. The neck of the tooth is where we find pulp. Enamel is the hardest substance found in the human body. All of the above statements are true. Ans- Enamel is the hardest substance found in the human body. Which of the following statements is TRUE regarding the accessory organ pictured above? (liver) a. It produces bile to digest fats and cholesterol. b. It produces insulin to metabolize blood glucose. c. It is considered endocrine only. d. It stores glycogen, vitamins, and minerals. e. a. and d. are true. f. b. and. c. are true. Ans- e. a. and d. are true. Which of the following statements is FALSE regarding the accessory organ pictured above? (pancreas) 90% of the cells perform digestive functions. It produces insulin to metabolize blood glucose. It is considered endocrine and exocrine All of the above statements are true. Ans- 90% of the cells perform digestive functions. Describe the clinical condition that results when the organ pictured above (specified by the pointer) is not able to function properly. (gallbladder) Ans- When the gallbladder is unable to break down fat and cholesterol present in the body, gall stones will occur. Pain occurs when these stones block the duct passin