Small Intestine, Pancreas and Liver ( lesson 5)

Question 1

What does the small intestine measures up to and what is the diameter?

Answer 1

Measures up to 7m
Diameter 2.5cm

Question 2

What are the three sections of the small intestine?

Answer 2

1) Duodenum (short, first section)
2) Jejunum (Middle section)
3) Ileum (longest, last section)

Question 3

Lining of the small intestine contains _____ _____? What do each of them contain and then what do those have?

Answer 3

They contain large folds
Each fold has many small folds called villi and villi has many microscopic folds called microvilli

Question 4

Why does the small intestine have a large SA?

Answer 4

To absorb digested food

Question 5

What are the functions of the small intestine?

Answer 5

1) Complete digestion of food
2) Absorb nutrient molecules

Question 6

What does the small intestine do with mechanical and chemical digestion?

Answer 6

Mechanical: Long small intestine peristalsis moves the chyme and breaks food apart more

Chemical: Proteins, carbs, and lipids are all completely digested in small intestine and enzymes help the process

Question 7

In the small intestine what do they produce secretions to help digestion?

Answer 7

1) Mucus
2) Enzymes
3) Liver and pancreas

Question 8

Describe the pancreas

Answer 8

Soft, flat and located behind stomach in humans

Question 9

What does the pancreatic juice contain?

Answer 9

1) Sodium bicarbonate
2) Digestive enzymes

Question 10

What is trypsin enzyme

Answer 10

Inactive form of trypsinogen and produced by pancreas and secreted in pancreatic juice that also breaks long peptides into short ones

Question 11

How can trypsinogen get activated?

Answer 11

In small intestine to become trypsin and activated by enterokinase enzyme

Question 12

Where is enterokinase produced by?

Answer 12

Intestinal glands

Question 13

Explain enterogasterone

Answer 13

Produced by pancreas and this is to slow peristalsis to help with complete digestion of fats

Question 14

Explain secretin and what could be a problem and a solution?

Answer 14

Produced when acid entering duodenum.
Problem: Enzyme pepsin inhibited by high pH
Solution: Trypsin and peptides work to digest proteins at higher pH

Question 15

Explain hormone CCK

Answer 15

Tiggers gall bladder to release bile

Question 16

What are the functions of the liver?

Answer 16

1) Mechanical digestion
2) Carbs storage and relese
3) Vitamin storage
4) Detoxification and breakdown