Day 3: The Energy Factory 🍏🔋
Preparatory Stage Science | Apex Institute of Maths and Sciences
🎯 1. Concept: Digestion is Breakdown
Your body cannot use a whole apple for energy. It must break it down into tiny pieces called Nutrients. This process is called Digestion.
The Main Stations:
- Mouth: Teeth crush food, and saliva (spit) starts breaking down starches.
- Food Pipe (Esophagus): A tube that pushes food down into the stomach.
- Stomach: A muscular bag that mixes food with acids to turn it into a liquid paste.
- Small Intestine: A long, coiled tube where nutrients are absorbed into the blood.
💡 2. Chemical Helpers: Enzymes
Your body uses special chemicals called Enzymes to speed up digestion. Saliva in your mouth contains enzymes that start working the moment you take a bite!
🌍 3. Science in Action: Why We Chew
Chewing is the first step of digestion. By breaking food into smaller bits, you make it easier for the stomach acids and enzymes to do their work. This is why eating slowly helps you stay healthy and energized.
📝 4. Lab Task: The Bread Investigation
Objective: Observe how enzymes in saliva work.
- Take a small piece of plain white bread.
- Chew it for 2 full minutes without swallowing.
- Observation: Does the bread start to taste sweet? This happens because the enzymes in your saliva are breaking the bread’s starch down into sugar!
✅ 5. Day 3 Practice Test
Test your knowledge of the body’s energy factory!
Easy
1. What is the process of breaking food into nutrients called?
Solution: Digestion is the breakdown of food into nutrients (Part 1).
Easy
2. Where does digestion begin?
Solution: Digestion starts in the mouth with chewing and saliva (Part 1).
Easy
3. Which organ acts like a “muscular bag” to mix food with acid?
Solution: The stomach mixes food into a liquid paste using acid (Part 1).
Easy
4. Nutrients are absorbed into the blood in the ________.
Solution: The small intestine is where nutrients enter the bloodstream (Part 1).
Medium
5. What are the special chemicals that speed up digestion called?
Solution: Enzymes are the chemical helpers that break down food (Part 2).
Medium
6. Why did the bread taste sweet in the lab task?
Solution: Saliva contains enzymes that break down starch (Part 4).
Medium
7. The tube connecting the mouth to the stomach is the:
Solution: The esophagus is the delivery tube for food (Part 1).
Medium
8. Chewing is important because it ________.
Solution: Smaller pieces of food are easier for the body to process (Part 3).
Hard
9. Assertion (A): Saliva is only for making food wet.
Reason (R): Saliva contains enzymes that start the digestion of starch.
Reason (R): Saliva contains enzymes that start the digestion of starch.
Solution: Saliva has a chemical job, not just a physical one (Part 2 & 4).
Hard
10. Where does the food go immediately after leaving the esophagus?
Solution: The food pipe pushes food directly into the stomach bag (Part 1).
That is wonderful my mother explanation is always the best and easiest for understand
That is wonderful my mother explanation is always the best and easiest for understand
Normal
Thank you
Interesting
I know I am the master of science and I am the topper in my class my wish is to be the scientist in future in the ISRO to help the ISRO in in making you things and and become the best scientist ever