Podcast
Questions and Answers
What describes mechanical digestion?
What describes mechanical digestion?
- Absorbing nutrients into the bloodstream
- The secretion of enzymes
- Physically breaking down food, like chewing (correct)
- Breaking molecular bonds in food
Which statement correctly defines peristalsis?
Which statement correctly defines peristalsis?
- A random contraction of muscles along the digestive tract
- A process that facilitates gas exchange in digestive organs
- A reverse movement that occurs during vomiting
- A muscle movement that moves food unidirectionally (correct)
What is the primary function of the digestive system?
What is the primary function of the digestive system?
- To facilitate muscle contractions
- To regulate blood sugar levels
- To transport oxygen throughout the body
- To break food down into simpler nutrients and absorb them (correct)
Which of the following tissues is NOT part of the small intestine?
Which of the following tissues is NOT part of the small intestine?
What role do goblet cells play in the digestive system?
What role do goblet cells play in the digestive system?
Flashcards
Mechanical Digestion
Mechanical Digestion
Physical breakdown of food, like chewing.
Chemical Digestion
Chemical Digestion
Chemical breakdown of food by breaking bonds in molecules.
Peristalsis
Peristalsis
Wave-like muscle movement that pushes food through the digestive tract.
Mucus (digestive tract)
Mucus (digestive tract)
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Small Intestine Structure
Small Intestine Structure
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Study Notes
Mechanical Digestion
- Food is physically broken down, like chewing.
Chemical Digestion
- Food is broken down by breaking molecular bonds.
Peristalsis
- Wave-like muscle movement pushing food forward.
- Starts in the esophagus, continues through the digestive tract.
- One-way movement.
- Reverse peristalsis causes vomiting.
Small Intestine Structure
- Made up of mucosa (epithelial tissue), submucosa (connective tissue).
- Also contains circular muscle fibers and longitudinal muscle fibers.
- Serosa (connective tissue) and villi (epithelial tissue) are also present.
Goblet Cells
- Secrete mucus, creating a protective layer.
- Line the surfaces of the digestive tract.
Digestive System Function
- Intake food.
- Break down food into smaller nutrients.
- Absorb nutrients.
- Excrete waste.
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