Podcast
Questions and Answers
What are the 4 phases of processing food in your body?
What are the 4 phases of processing food in your body?
- Ingestion, digestion, absorption and filtration
- Ingestion, digestion, absorption and elimination (correct)
- Ingestion, secretion, absorption and excretion
- Digestion, absorption, metabolism and excretion
What is digestion?
What is digestion?
The process that breaks down food into small molecules so they can move into the bloodstream.
What does food pass through?
What does food pass through?
Digestive tract
What are the major organs of the digestive tract?
What are the major organs of the digestive tract?
What are the three organs that food does not pass through, but store enzymes & chemicals that help break down food?
What are the three organs that food does not pass through, but store enzymes & chemicals that help break down food?
What are enzymes?
What are enzymes?
Where does mechanical digestion take place?
Where does mechanical digestion take place?
Where does chemical digestion take place?
Where does chemical digestion take place?
What is the watery substance in your mouth called?
What is the watery substance in your mouth called?
What does saliva contain?
What does saliva contain?
What does salivary amylase do?
What does salivary amylase do?
How much saliva is produced by your body each day?
How much saliva is produced by your body each day?
How long does it take for food to pass through the esophagus?
How long does it take for food to pass through the esophagus?
What is the process called when muscles push food through the esophagus?
What is the process called when muscles push food through the esophagus?
What is the stomach?
What is the stomach?
How many ways does the stomach digest food?
How many ways does the stomach digest food?
What happens in mechanical digestion?
What happens in mechanical digestion?
What happens in chemical digestion?
What happens in chemical digestion?
What are the two reasons the stomach produces mucus?
What are the two reasons the stomach produces mucus?
What would happen if the stomach did not have mucus?
What would happen if the stomach did not have mucus?
How long does it take for food to move through the stomach?
How long does it take for food to move through the stomach?
What does food look like after moving through the stomach?
What does food look like after moving through the stomach?
Where do the digestive juices added to the small intestine come from?
Where do the digestive juices added to the small intestine come from?
What does the liver produce?
What does the liver produce?
What does the pancreas do?
What does the pancreas do?
What is insulin?
What is insulin?
What are the tiny, fingerlike projections in the small intestine called?
What are the tiny, fingerlike projections in the small intestine called?
How is food absorbed in the small intestine?
How is food absorbed in the small intestine?
What is the main job of the large intestine?
What is the main job of the large intestine?
How long does chyme stay in the large intestine and what happens to it?
How long does chyme stay in the large intestine and what happens to it?
We have bacteria that feed on our undigested waste. Is this a good thing?
We have bacteria that feed on our undigested waste. Is this a good thing?
What is the gist of digestion?
What is the gist of digestion?
Flashcards
Food Processing Phases
Food Processing Phases
The four main stages of food processing are ingestion, digestion, absorption, and elimination.
Digestion Overview
Digestion Overview
Breaking down food into small molecules for the body to absorb.
Digestive Tract
Digestive Tract
The pathway food takes through the body, including the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus.
Accessory Organs
Accessory Organs
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Enzymes
Enzymes
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Mechanical Digestion
Mechanical Digestion
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Chemical Digestion
Chemical Digestion
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Saliva
Saliva
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Salivary Amylase
Salivary Amylase
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Peristalsis
Peristalsis
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Stomach Function
Stomach Function
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Chyme
Chyme
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Villi
Villi
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Nutrient Absorption
Nutrient Absorption
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Large Intestine's Job
Large Intestine's Job
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Beneficial Bacteria
Beneficial Bacteria
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Importance of Digestion
Importance of Digestion
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Study Notes
Phases of Food Processing
- Four phases: ingestion, digestion, absorption, and elimination.
Digestion Overview
- Defined as the breakdown of food into smaller molecules for absorption into the bloodstream.
Digestive Tract
- Comprises the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus.
Accessory Organs
- Liver, pancreas, and gallbladder store enzymes and chemicals aiding digestion but do not directly process food.
Enzymes
- Molecules that accelerate chemical reactions within the body.
Mechanical Digestion
- Occurs through chewing in the mouth and churning in the stomach.
Chemical Digestion
- Involves acids and enzymes breaking down food in the mouth, stomach, and small intestine.
Saliva
- A watery substance in the mouth containing mucus and salivary amylase.
Salivary Amylase
- Begins starch breakdown into sugars.
Saliva Production
- The body produces approximately 1.5 liters of saliva daily.
Esophagus Passage Time
- Food typically moves through the esophagus in about four to ten seconds.
Peristalsis
- The contraction and relaxation of muscles behind and in front of the food, respectively, that moves food forward.
Stomach Function
- A muscular organ that expands upon food entry, digesting food both mechanically and chemically.
Mechanical Digestion in the Stomach
- Achieved by mixing food via muscular walls.
Chemical Digestion in the Stomach
- Involves strong digestive juices like hydrochloric acid and enzymes mixing with food.
Mucous Production
- Protects the stomach lining and lubricates food.
Mucous and Acid Balance
- Insufficient mucous production can lead to stomach damage from digestive acids.
Stomach Passage Duration
- Food remains in the stomach for about four hours, transforming into chyme.
Chyme
- Chyme is a thin, watery liquid that progresses to the small intestine post-digestion.
Digestive Juices in Small Intestine
- Added from the liver and pancreas.
Liver's Role
- Produces bile to emulsify fats and aids in fat digestion.
Pancreas Function
- Produces insulin, facilitating glucose absorption into body cells.
Villi
- The small intestine walls feature ridges and folds covered with villi, enhancing nutrient absorption.
Nutrient Absorption
- Chyme's nutrients are absorbed into blood vessels in the villi via diffusion and active transport.
Large Intestine Function
- Absorbs water from undigested chyme, returning significant water to the body.
Chyme in the Large Intestine
- Can remain for up to three days, becoming more solid.
Beneficial Bacteria
- Bacteria in the large intestine aid digestion by producing essential vitamins.
Importance of Digestion
- Essential for nourishing cells and providing energy, thus preventing starvation.
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