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Draw a labelled diagram of the digestive system of a named monogastric animal - Leaving Cert Agricultural Science - Question a - 2011
Question a
Draw a labelled diagram of the digestive system of a named monogastric animal. Describe an experiment to investigate the action of one named digestive enzyme.
Worked Solution & Example Answer:Draw a labelled diagram of the digestive system of a named monogastric animal - Leaving Cert Agricultural Science - Question a - 2011
Step 1
Draw a labelled diagram of the digestive system of a named monogastric animal.
Answer
For this task, I will illustrate the digestive system of a pig, a common monogastric animal.
- Mouth: Entry point for food.
- Esophagus: Tube transporting food to the stomach.
- Stomach: Sac where food is mixed with gastric juices.
- Small Intestine: Site for further digestion and absorption of nutrients.
- Large Intestine: Absorbs water and forms feces.
- Anus: Exit for feces.
Diagram labels:
- Mouth
- Esophagus
- Stomach
- Small Intestine
- Large Intestine
- Anus
The diagram should clearly label each part, illustrating how food travels through the digestive system.
(Replace with actual diagram reference)
Step 2
Describe an experiment to investigate the action of one named digestive enzyme.
Answer
To investigate the action of the enzyme amylase:
- Named enzyme: Amylase.
- Matching substrate: Starch (as amylase breaks down starch).
- Suitable temperature: Set a water bath at 37°C, the optimal temperature for amylase activity.
- Experiment setup:
- Mix starch solution with amylase in a test tube and place it in the water bath.
- Periodically check the mixture using iodine solution to test for the presence of starch (the iodine will change color).
- Control: Conduct a parallel experiment without amylase to compare results.
- Expected results: If amylase is acting on starch, the iodine will not change color after a specific time, indicating starch breakdown.
- Conclusion: The rate of enzyme action can be inferred by the time taken for starch to be completely broken down, demonstrating the effectiveness of amylase.