Describe the events that would occur to some protein in a boiled egg from moment it is taken into mouth until absorbed blood?
1) Initial breakdown in mouth
- Once consumed, the heat treatment of boiling has already caused some protein denaturation, facilitating initial digestion.
- Mechanical digestion: Chewing breaks down the egg into smaller pieces increasing surface area for enzyme access.
- Salivary amylase: Breaks down starches in food, although eggs contain little starch.
- Lingual lipase: Begins breaking down fats on egg surface, although eggs mainly contain saturated (indigestible) fats.
2) Esophagus
- Peristalsis: Rhythmic muscular contractions propel the food bolus (partially chewed food) down the throat and into the stomach.
3) Stomach
- Gastric juices: Comprises hydrochloric acid (HCl) which denatures protein and kills most bacteria, and pepsin, an enzyme that begins to break down proteins into smaller polypeptides.
- Mechanical churning: Muscular contractions mix and churn the food bolus with gastric juices to form a semi-liquid mixture called chyme.
- Pepsin: Begins breaking down proteins, particularly denatured egg proteins due to heat treatment.
4) Small intestine
-Chyme enters the small intestine, where most digestion and absorption occur.
- The pancreas releases digestive enzymes, including:
- Trypsin: Further breaks down proteins into smaller polypeptides.
- Chymotrypsin: Cuts proteins, specifically those on aromatic amino acids (like tryptophan and tyrosine)
- Carboxypeptidases: Cleave amino acid residues from the end of polypeptide chains.
- The liver produces bile which emulsifies fats (not the primary component of eggs)
- Brunner's glands in submucosa secrete alkaline mucus to neutralize acidic chyme from the stomach.
5) Absorption in small intestine
-Proteins broken down into amino acids are absorbed through the mucosal lining of small intestine.
-Amino acids enter bloodstream through capillaries lining the villi of small intestine.
6) Large intestine
- Undigested substances, water, and electrolytes are absorbed here
Egg Recipes
- What animal has a square egg?
- Describe two basic egg preparation methods?
- Is a egg put in malted milk drink?
- What are the condition favourable for incubating egg?
- Are hard boiled eggs supposed to have a runny yolk?
- Why should you wash your hands after handling eggs?
- What happens to the shell of an egg when put in tomato juice?
- What do chicken eggs look like inside?
- Is there be colorful baby fish eggs?
- Can you eat egg after the best before date?
Egg Recipes
- Bread Machine Recipes
- Bread Recipes
- Cereal Recipes
- Cold Breakfast Recipes
- Egg Recipes
- Hot Breakfast Recipes
- Omelet Recipes
- Pancake Recipes
