Digestive System Part 2

Question 0

4 Types of teeth

Answer 0

Incisors: cut
Canines: tear
Bicuspids: grind
Molars: crush

Question 1

What kinds of digestion are associated with the oral cavity?

Answer 1

Chemical and Mechanical

Question 2

Saliva consists of what 2 things?

Answer 2

Water and salt

Question 3

3 organic molecules

Answer 3

Mucous
Lysozyme
Amylase

Question 4

How long does it take for food to travel down the esophagus?

Answer 4

4-8 sec

Question 5

Peristalsis

Answer 5

Involuntary wave-like muscle contractions that moves food along the digestive tract

Question 6

Cardiac Region

Answer 6

Prevents acid from moving back into the esophagus ( reflux: causes heartburn)

Question 7

Stomach

Answer 7

Both mechanical and chemical digestion

Question 8

3 function of stomach

Answer 8

1. Temporarily stores food
2. Breaks food down into chyme (liquid mixture)
3. Begins protein digestion by gastric juices

Question 9

Gastric juices contain what 4 things

Answer 9

Mucous: protection
Pepsinogen: digestion
HCl: ruptures cells and activates gastrin and kills bacteria
Gastrin: digestion

Question 10

What is the ph of gastric juices

Answer 10

1.4-1.6

Question 11

Is there absorption in the stomach?

Answer 11

A little. Exceptions: aspirin, ethyl alcohol, water

Question 12

How long is the small intestine? 3 segments?

Answer 12

30 feet
Duodenum
Jejunum
Ileum

Question 13

What is the major site of chemical digestion and absorption?

Answer 13

Small intestine

Question 14

The small intestine has ___ that increases surface area

Answer 14

Villiprojections

Question 15

The jejunum and ileum are suspended by what?

Answer 15

mesentery

Question 16

What does the Mesentery do?

Answer 16

Gives mobility to the bowel within the abdomen and helps move food along

Question 17

2 types of waste

Answer 17

Feccess and Nitrogen

Question 18

How long is the large intestine? Functions?

Answer 18

5 feet
> reabsorption of water
> contains bacteria that produce K and vitamin B12