Podcast
Questions and Answers
What is the primary function of the small intestine?
What is the primary function of the small intestine?
- Digesting fats
- Storing bile
- Absorbing nutrients (correct)
- Producing enzymes
Which part of the small intestine is primarily responsible for the majority of nutrient absorption?
Which part of the small intestine is primarily responsible for the majority of nutrient absorption?
- Jejunum (correct)
- Ileum
- Duodenum
- Colon
What is the function of bile produced by the liver?
What is the function of bile produced by the liver?
- To break down fats (correct)
- To reduce acidity in the stomach
- To absorb vitamins
- To compact waste
What role does the pancreas play in digestion?
What role does the pancreas play in digestion?
What is the main function of the large intestine?
What is the main function of the large intestine?
Which of the following protective measures is NOT recommended for safety against chemical hazards?
Which of the following protective measures is NOT recommended for safety against chemical hazards?
Which step is NOT part of the recommended strategies to prevent food poisoning?
Which step is NOT part of the recommended strategies to prevent food poisoning?
Which route is associated with the ingestion of chemical hazards?
Which route is associated with the ingestion of chemical hazards?
Which of the following accurately describes a function of the digestive system?
Which of the following accurately describes a function of the digestive system?
What is the correct order of the four stages of food processing?
What is the correct order of the four stages of food processing?
What role does the epiglottis play in the digestive system?
What role does the epiglottis play in the digestive system?
Which part of the digestive system is responsible for pushing the bolus toward the stomach?
Which part of the digestive system is responsible for pushing the bolus toward the stomach?
Which of the following statements about the tongue is true?
Which of the following statements about the tongue is true?
What is the process by which food is moved through the esophagus?
What is the process by which food is moved through the esophagus?
Which of the following contributes to the breakdown of food in the mouth?
Which of the following contributes to the breakdown of food in the mouth?
What function do the salivary glands perform in the digestive system?
What function do the salivary glands perform in the digestive system?
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Study Notes
Digestive System Functions
- Breaks down food into nutrients
- Absorbs nutrients into the bloodstream
- Removes indigestible waste
Stages of Food Processing
- Ingestion - Taking in food
- Digestion - Breaking down food into nutrients
- Absorption - Nutrients taken in by cells
- Egestion - Removing leftover waste
Parts of the Digestive System
- Mouth
- Teeth mechanically break down food
- Tongue mixes food with saliva (containing amylase, which breaks down starch)
- Epiglottis prevents food from entering the trachea
- Salivary Glands
- Produce saliva
- Tongue
- Pushes food into the esophagus
- Mixes food and helps with speech
- Used for tasting
- Pharynx
- Divided into nasopharynx, oropharynx, and laryngopharynx
- Bolus passes through the pharynx on it's way to the esophagus
- Esophagus
- Muscular tube between the mouth and stomach
- Bolus travels through the esophagus by peristalsis
- Peristalsis
- Wave of muscular contractions that propel the bolus toward the stomach
- Stomach
- Muscular pouch that mixes the bolus with gastric juice (a mixture of stomach acid, mucus, and enzymes)
- Small Intestine
- Where 90% of nutrient absorption takes place
- Divided into the duodenum, jejunum, and ileum
- Duodenum
- Connects the stomach to the small intestine
- Jejunum
- Where most of the absorption takes place
- Ileum
- Final portion of the small intestine
- Compacts leftover food to pass into the large intestine
- Liver
- Produces bile (stored in the gallbladder)
- Bile breaks down fats
- Pancreas
- Secretes juice to reduce the acidity of chyme (partially digested food)
- Large Intestine (Colon)
- Absorbs water from waste
- Produces vitamin K and some B vitamins using bacteria
- Sections:
- Ascending colon
- Transverse colon
- Descending colon
- Sigmoid colon
- Rectum
- Anal Canal
Safety of the Digestive System
- Tools of Protection
- Chemical protective clothing
- Gloves
- Eye protection
- Face mask
- Chemical Hazard Routes
- Digestive System
- Ingestion
- Inhalation
- Integumentary System
- Skin contact
- Skin absorption
- Digestive System
Food Poisoning
- Prevention Steps and Strategies
- Clean
- Separate
- Cook
- Chill
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