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Nutrition Ch.3
Digestion, Absorption, and Transport
Question | Answer |
---|---|
Mechanical Digestion | Chewing and breaking the food into smaller pieces by the teeth |
Chemical Digestion | Starches are broken down by the enzyme Amylase |
Bolus | Soft lump of food that formed in the mouth and then swallowed |
Chyme | Creamy paste of food formed in the stomach |
Intestinal flora | Normal bacteria that live in the intestine , makes some vitamins, compete with and kills harmful bacteria, balance of gram+ and gram- which helps maintain weight |
Segmentation | The squeezing of intestinal muscles to move the food |
Fat absorption | Fats are first combined with proteins and absorbed into the lympathic capillaries and then travel to the heart |
Main function of the large intestine | To absorb water and some minerals |
Feces | Undigested materials that leaves the large intestine |
Hepatic Portal System | Vein -> Capillaries -> Vein. The capillaries in the villi evenutally joins and leave the intestine and enters the hepatic portal vein, which then enters the live and branches back into capillaries |
Functions of the Liver | Detoxifies, Breaks down alcohol and drugs, Makes amino acids, Makes urea (urine), plasma proteins and some fats |
Vomiting | Peristalsis reverses and the stomach content gets expand upward toward the esophagus and out of the mouth. Constant vomiting causes damage to the esophagus, teeth, mouth, and deplete the body of water. Causes- bacteria, toxins, and stress |
Diarrhea | Loose watery stool (feces), causes lost of water, Causes- bacteria, toxins, and stress |
Constipation | Difficult or painful bowel movement, Causes- too little physical activity, too little fiber, stress and irregular eating or sleeping habits |
Heartburn | Pain in the esophagus due to stomach acid, Causes- overfull stomach, eating too fast, tight clothing, smoking, stress, spices, caffeine, peppers, age, and some medicine |
Cause of belching | Swallowing too much air |