SOLUTION: Digestive System worksheet / InThinking - ANSWERS ... - Free Printable

Quick Test: Digestive System

#### Complete the boxes
1. Large muscular sac for mechanical and chemical digestion
- Answer: The Stomach
- Explanation: The stomach is a large, muscular organ that performs both mechanical digestion (through churning and mixing) and chemical digestion (using enzymes like pepsin to break down food).

2. Organ that stores bile
- Answer: The Gallbladder
- Explanation: The gallbladder is a small, pear-shaped organ located beneath the liver. Its primary function is to store and concentrate bile produced by the liver.

3. Large tubular organ that removes water from the digestive tract
- Answer: The large intestine
- Explanation: The large intestine, also known as the colon, absorbs water and electrolytes from the remaining indigestible food matter, forming solid waste (feces).

4. Muscular opening at the end of the large intestine
- Answer: The anus
- Explanation: The anus is the terminal part of the digestive tract where feces are expelled from the body.

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#### Multiple Choice Questions
1. Which organ is responsible for the breakdown of proteins?
- Correct Answer: (c) Large organ that produces protein-digesting enzymes and acid
- Explanation: The stomach contains hydrochloric acid and enzymes like pepsin, which are essential for breaking down proteins into smaller peptides.

2. Digestion starts in the mouth with the help of:
- Correct Answer: (b) Salivary glands that secrete saliva containing enzymes
- Explanation: Saliva contains enzymes like amylase, which begin the process of breaking down carbohydrates in the mouth.

3. The major duct that carries bile from the liver to the duodenum is called:
- Correct Answer: (a) Bile duct
- Explanation: The bile duct (also known as the common bile duct) transports bile from the liver and gallbladder to the small intestine (duodenum).

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#### True/False Questions
1. The small intestine is the site where most nutrients are absorbed.
- Answer: True
- Explanation: The small intestine is primarily responsible for nutrient absorption due to its extensive surface area provided by villi and microvilli.

2. The pancreas produces enzymes that digest fats, proteins, and carbohydrates.
- Answer: True
- Explanation: The pancreas secretes digestive enzymes such as lipase (for fats), proteases (for proteins), and amylase (for carbohydrates).

3. The large intestine is the site where most water is absorbed.
- Answer: True
- Explanation: The large intestine absorbs water from the undigested food material, converting it into a more solid form before it is expelled as feces.

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Final Summary

- Complete the boxes:
1. The Stomach
2. The Gallbladder
3. The large intestine
4. The anus

- Multiple Choice Questions:
1. (c) Large organ that produces protein-digesting enzymes and acid
2. (b) Salivary glands that secrete saliva containing enzymes
3. (a) Bile duct

- True/False Questions:
1. True
2. True
3. True

This completes the test. If you have any further questions, feel free to ask!