Chapter 3 (part 3)

Question 1

What are the two transport pathways?

Answer 1

• Bloodstream

- Lymphatic System

Question 2

Bloodstream

Answer 2

• water-soluble nutrients and smaller products of digestion

- liver is the first stop

Question 3

Lymphatic System

Answer 3

• larger fats and fat-soluble vitamins

- Chylomcirons- large fat and protein

Question 4

Is the Vascular system closed or opened? and what acts as a pump for it?

Answer 4

• closed system of vessels

- heart acts as pump

Question 5

How does blood leave the digestive system?

Answer 5

via the hepatic portal vein

out of small intestine to liver

Question 6

The Liver and the points

Answer 6

• key position in nutrient transport
• 1st to receive nutrients absorbed from GI tract
• Prepares absorbed nutrients for use by body
• Major metabolic organ (involved in a lot of body processes)
• Defends by detoxifying harmful substances and excreting waste

Question 7

The Lymphatic System Points

Answer 7

• one way route for fluid from tissue
• no pump
• much of lymph collects into thoracic duct behind heart which opens into subclavian vein

Question 8

What does the lymphatic system bypass?

Answer 8

the liver at first

Question 9

Factors that Influence GI functions

Answer 9

• immaturity
• aging
• illness
• nutrition

Question 10

Benefits of Gastrointestinal Bacteria

Answer 10

-alleviate diarrhea
-constipation
Irritable Bowel Disease
-Ulcers
-Allergies
-Lactose Intolerance
_Protection Against Colon Cancer

Question 11

Pro biotic

Answer 11

living microorganism found in foods, beneficial to health

Question 12

prebiotics

Answer 12

food components not digested, used as food by GI bacteria

Question 13

What role does GI bacteria play in Vitamin production?

Answer 13

• it does help produce

- B6,B12,Folate, and Vitamin K

Question 14

Homeostasis

Answer 14

regulation of digestion, temperature, and blood pressure

Question 15

What are the two systems that coordinate all digestive and absorptive processes?

Answer 15

• endocrine(hormonal)

- Nervous System(nerves)

Question 16

What is a feedback mechanism?

Answer 16

certain conditions demands a response

Question 17

GI hormones

Answer 17

Gastrin,Secretin,CCk

Question 18

Secretin-Pancreas-Bicarb

Answer 18

• acidic chyme
• duodenal wall in small intestine
• secretin(hormone)
• pancreatic juices
• bicarbonate neutralizes

Question 19

Can the pancreas help digest all 3 macro nutrients?

Answer 19

Through

• carb/ amylases
• proteases
• lipases

Question 20

In Order for the Digestive System To Be At its Best What does it depend on?

Answer 20

• healthy supply of blood
• lifestyle factors
• types of food eaten