B3 - The Digestive System Flashcards
(27 cards)
Define cell.
Basic unit of living things.
Define tissue.
Groups of similar cells performing the same function.
Define organ.
Group of tissues performing the same function.
Define organ system.
Groups of organs performing the same function.
List the three types of tissue.
Muscular, glandular and epithelial.
Describe the role of bile.
Neutralises stomach acid and breaks fats down into droplets.
Name the organ where bile is produced.
Liver.
Name the organs involved in digestion.
Mouth, oesophagus, stomach, liver, small intestine, large intestine, anus.
Give the function of the small intestine.
Reabsorbs glucose from digested food.
List the adaptations of the small intestine.
Lots of microvilli, good blood supply, thin walls, lots of mitochondria.
Name the substance the stomach contains.
Hydrochloric acid (pH 3).
Name the part of the digestive system is responsible for reabsorbing water.
Large intestine.
Describe the test for starch.
Iodine solution. It turns dark blue/black.
Describe the test for simple sugars (glucose).
Benedict’s solution. It turns brick red when heated.
Describe the test for protein.
Biuret solution. It turns purple.
Describe the test for Lipids (fats).
Ethanol - milky emulsion is formed.
What are proteins broken down into?
Amino acids.
What are carbohydrates broken into?
Glucose.
What are lipids broken down into?
Glycerol and fatty acids.
Define enzyme.
Biological catalyst (speeds up reactions).
Name the three types of digestive enzyme.
Amylase (carbohydrase), proteases, lipases.
Where is Amylase produced?
Mouth, pancreas, small intestine.
Where are protease enzymes produced?
Stomach, pancreas, small intestine.
Where are lipase enzymes produced?
Pancreas, small intestine.
