minutes WITHOUT SWALLOWING, you would notice a change in the way the bread tastes. It will taste as you expect bread to taste, but after a few minutes, the bread begins to taste Explain.
minutes WITHOUT SWALLOWING, you would notice a change in the way the bread tastes. It will taste as you expect bread to taste, but after a few minutes, the bread begins to taste Explain.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:### Activity: Exploring Enzyme Activity in Saliva
**Objective:** Understand how enzymes in saliva break down starch and observe the resulting taste change.
---
**Instructions:**
1. **Preparation:**
- Obtain a piece of bread.
- Make sure not to swallow the bread during the activity.
2. **Observation:**
- Start chewing a piece of bread and keep it in your mouth for a few minutes WITHOUT SWALLOWING.
- Pay close attention to the taste changes over time.
3. **Expected Result:**
- Initially, the bread will taste as you normally expect it to.
- After a few minutes, the taste will change and the bread will begin to taste sweet.
**Explanation:**
- Saliva contains an enzyme called amylase that digests (breaks down) starch.
- Starch, the complex carbohydrate present in bread, is broken down into simpler sugars by the action of amylase.
- As the starch is broken down into sugars, the bread tastes sweeter due to the presence of these simpler sugars.
**Question for Reflection:**
- Why does the bread begin to taste sweet after a few minutes of chewing?
---
***Note:*** This activity demonstrates a basic principle of digestion and the role of enzymes in breaking down food into simpler substances that can be more easily absorbed and utilized by the body.
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