A fatty meal passes through the gut of a student…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A fatty meal passes through the gut of a student.
- Which hormone, released when food is in the stomach, makes the gastric glands release HCl and pepsinogen?
- The acid food enters the duodenum. Which hormone is released, and what does it make the pancreas release?
- Fat in the duodenum releases a hormone that acts on two organs. Name the hormone and the two organs.
- Which hormone slows the gastric secretion and movement?
- Are these hormones made by a gland, or by cells in the wall of the gut?
Need a reminder? The key ideaShow
The atrial wall makes ANF, which dilates the blood vessels and lowers the blood pressure. The kidney makes erythropoietin, which stimulates the making of red blood cells. Gastrin acts on the gastric glands (HCl and pepsinogen), secretin on the exocrine pancreas (water and bicarbonate), CCK on the pancreas and gall bladder (enzymes and bile), and GIP inhibits the stomach. Blood pressure is the cardiac output times the resistance.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Gastrin.
Step 2. (b) Secretin. It makes the exocrine pancreas release water and bicarbonate ions.
Step 3. (c) CCK. It acts on the pancreas (enzymes) and the gall bladder (bile).
Step 4. (d) GIP, the gastric inhibitory peptide.
Step 5. (e) By endocrine cells in the wall of the stomach and the small intestine.
Answer: (a) gastrin; (b) secretin, water and bicarbonate; (c) CCK, the pancreas and the gall bladder; (d) GIP; (e) cells in the wall of the gut.
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