The first section of the small intestine is the ...

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Prepare for the Leaving Certificate Digestion Test with engaging questions and explanations. Ready yourself with multiple choice quizzes, hints, and deep insights. Be exam-ready now!

Multiple Choice

The first section of the small intestine is the ...

Explanation:
The first section of the small intestine is the duodenum. It sits right after the stomach and is where chyme meets bile and pancreatic juice, so the acidic mix is neutralized and the initial digestion of nutrients begins. This short, C-shaped section handles the chemical breakdown with enzymes from the pancreas and enzymes at the intestinal lining, and it helps protect the gut lining with alkaline secretions. Although some digestion and a little absorption occur here, most nutrient absorption happens later in the jejunum and ileum. The rectum isn’t part of the small intestine.

The first section of the small intestine is the duodenum. It sits right after the stomach and is where chyme meets bile and pancreatic juice, so the acidic mix is neutralized and the initial digestion of nutrients begins. This short, C-shaped section handles the chemical breakdown with enzymes from the pancreas and enzymes at the intestinal lining, and it helps protect the gut lining with alkaline secretions. Although some digestion and a little absorption occur here, most nutrient absorption happens later in the jejunum and ileum. The rectum isn’t part of the small intestine.

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