Animal tissues, organs and organ systems Flashcards
Define “Digestive system”
The digestive system is an example of an organ system in which several organs work together to digest and absorb food.
What do digestive enzymes do?
Digestive enzymes convert food into small soluble molecules that can be absorbed into the bloodstream
What does carbohydrase do?
Carbohydrases break down carbohydrates to simple sugars. Amylase is a carbohydrase which breaks down starch.
What does portease do?
Proteases break down proteins to amino acids.
What does lipase do?
Lipases break down lipids (fats) to glycerol and fatty acid
What are the products of digestion used for?
The products of digestion are used to build new carbohydrates, lipids and proteins. Some glucose is used in respiration.
What is bile?
Bile is made in the liver and stored in the gall bladder. It is alkaline to neutralise hydrochloric acid from the stomach. It also emulsifies fat to form small droplets which increases the surface area. The alkaline conditions and large surface area increase the rate of fat breakdown by lipase.
