Introduction to Digestion, Enzymes (lesson 3)

Question 1

What are the three processes digestion is composed?

Answer 1

1) Breakdown of food into small molecules
2) Absorption of these small molecules into blood
3) Removal of waste products

Question 2

What is the digestive tract?

Answer 2

Long tube that starts in your mouth and winds through body ending at the tract and digestion happens here

Question 3

What other organs are not apart of this tract but also help in digestion?

Answer 3

Liver and pancreas

Question 4

What is the two types of digestion and explain each?

Answer 4

1) Mechanical digestion: Breakdown of food into smaller pieces, increase SA and makes chemical digestion more efficient and physical movement mix food with enzymes
eg: Chewing, churning in stomach

2) Chemical digestions: Enzymes help break chemical bonds within large food molecules so it can be absorbed by small intestine
eg: Carbs brown down into monosaccharides

Question 5

What do enzymes do?

Answer 5

They are proteins that speed up and make ideal conditions for chemical reactions to happen

Question 6

Explain the lock and key model of enzyme action

Answer 6

Every enzyme is like a lock because each enzyme needs a specific key (substrate). The gap of the key and the lock would be the active site and in order to get the door open (create a product)

Question 7

What are some enzymes involved in digestion?

Answer 7

1) Amylase
2) Maltase
3) Lipase
4) Proteases

Question 8

What are three factors affecting enzyme action with simple definitions

Answer 8

1) Temp: As temp rises, chemical reactions tend to speed up

2) Factors affecting enzyme action: More substrate = more action

3) Inhibitors: Block enzyme action and can take up the active site or change shape of enzyme