Question

Below are some of this week's learning goals. Pick one from the list below that still feels a bit difficult to you or that you'd like to explore. Using only items found in your kitchen right now, create a model demonstrating one or more concept(s) from the learning goal. Take a series of photos or a video and show us your work. Include a written or audio description of your work demonstrating your understanding of the physiological concept, along with a statement about what you think worked particularly well in your art work, and what might not have come through as clearly.

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• Describe the composition and function of the digestive secretions
• Discuss the roles of the liver, pancreas, and gallbladder in digestion
• Compare and contrast the digestion of the three macronutrients
• Explain how the body maintains blood sugar levels in the pre- and post-absorptive states

Answer 1

Roles of the liver, pancreas, and gallbladder in digestion

• This is a model made by made for the illustration of the digestive system of the body, using the items available in the kitchen as per the question.
• Chemical digestion in the small intestine cannot occur without the help of the liver and pancreas. The liver produces bile and delivers it to the common hepatic duct. Bile contains bile salts and phospholipids, which emulsify large lipid globules into tiny lipid droplets, a necessary step in lipid digestion and absorption. The gallbladder stores and concentrates bile, releasing it when it is needed by the small intestine.
• The pancreas produces the enzyme- and bicarbonate-rich pancreatic juice and delivers it to the small intestine through ducts. Pancreatic juice buffers the acidic gastric juice in chyme, inactivates pepsin from the stomach, and enables the optimal functioning of digestive enzymes in the small intestine.