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Questions and Answers
What is the primary function of the villi in the small intestine?
What is the primary function of the villi in the small intestine?
- To produce enzymes for protein digestion
- To increase the surface area for absorption of nutrients (correct)
- To aid in the mechanical digestion of food
- To produce bile
What is the function of the gallbladder in the digestive system?
What is the function of the gallbladder in the digestive system?
- To absorb nutrients from food
- To store and pump bile into the duodenum (correct)
- To aid in the mechanical digestion of food
- To produce bile
What is the result of chemical digestion in carbohydrates?
What is the result of chemical digestion in carbohydrates?
- Simple sugars (correct)
- Fatty acids
- Bile
- Amino acids
Which enzyme is responsible for breaking down lipids in the small intestine?
Which enzyme is responsible for breaking down lipids in the small intestine?
What is responsible for the movement of food through the digestive tract?
What is responsible for the movement of food through the digestive tract?
Which organ produces an enzyme that aids in the digestion of proteins?
Which organ produces an enzyme that aids in the digestion of proteins?
Which organ is responsible for producing enzymes that break down proteins?
Which organ is responsible for producing enzymes that break down proteins?
What is the main function of the esophagus?
What is the main function of the esophagus?
Which structure is responsible for increasing the surface area of the small intestine?
Which structure is responsible for increasing the surface area of the small intestine?
Which enzyme is responsible for breaking down carbohydrates in the mouth?
Which enzyme is responsible for breaking down carbohydrates in the mouth?
What is the function of the gastro vascular cavity?
What is the function of the gastro vascular cavity?
What is the main function of the stomach?
What is the main function of the stomach?
Which organ is responsible for storing bile?
Which organ is responsible for storing bile?
What type of movement aids in the passage of food through the digestive tract?
What type of movement aids in the passage of food through the digestive tract?
Where does most of the digestion and absorption of nutrients occur?
Where does most of the digestion and absorption of nutrients occur?
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Study Notes
Digestive System
- The human digestive system consists of the mouth, esophagus, stomach, small intestine, and large intestine, but not the gastro vascular cavity.
Food Breakdown
- Breaking down of food into thinner pieces occurs in the mouth and stomach.
- In the mouth, food is broken down into smaller pieces by chewing.
- In the stomach, food is mixed with stomach acid and digestive enzymes to break down proteins and fats.
Enzymes and Digestion
- Saliva contains the enzyme amylase, which aids in the digestion of carbohydrates in the mouth.
- Lipase is the enzyme that aids in the digestion of lipids in the small intestine.
Small Intestine Structure
- The internal surface of the small intestine is lined with tiny finger-like structures called villi, which increase the surface area for nutrient absorption.
Organs and Functions
- The liver is a large internal organ that produces bile, which aids in the digestion of fats.
- The gallbladder stores bile and pumps it into the duodenum.
- The stomach is a large internal organ that mixes food with stomach acid and digestive enzymes.
Nutrient Absorption
- Nutrient absorption mostly occurs in the small intestine.
- Absorption of nutrients does not occur in the stomach or large intestine.
Passage of Food
- The passage of food through the digestive tract is aided by wave-like muscle contractions, not by pull from the anus, chemical absorption, or movement of cilia.
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