Unit 2 absobtion of materials

Question 1

Capillaries

Answer 1

Thin walled and have a large surface area , forming networks at tissues and organs to allow efficient exchange materials

Question 2

What is nessasery for resperation

Answer 2

Oxegen and nutrients from food must be absorbed into the blood stream

Question 3

Waste materials

Answer 3

Carbon dioxide must be removed from cells in the blood stream

Question 4

Why do tissues contain capillary networks

Answer 4

Allow the exchange of materials at a cellular level

Question 5

Surfaces involved in absorbtion of materials

Answer 5

Large surface area
Thin walls
Extensive blood supply

( increase efficiency of absorbtion )

Question 6

Lungs

Answer 6

Gas exchange organs

Consist of a large number of alveoli

Question 7

Alveoli

Answer 7

Think sacs in the lungs that form gas excahnge surface

Question 8

Digestion

Answer 8

Breakdown of large inslubale food molecules

Question 9

Fatty acids

Answer 9

Products of the Digestion of fat absorbed into lacteal

Question 10

Lacteal

Answer 10

Central vessel in villi responsible for absobtion of the products of fat digestion

Question 11

Lymph

Answer 11

Liquid that circulates within animals

Transports the products of aft digestion from the lacteals

Question 12

Mucus

Answer 12

Sticky substance lining the trachea and bronchi, trapping duct dust and bacteria

Question 13

Peristalis

Answer 13

Waves of muscular contraction responsible for the movement of food through intestines

Question 14

Villi

Answer 14

Finger- like projections of the small intestines lining providing a large surface area for absorbtion food

Question 15

Wat does each villis contain

Answer 15

Network of capilllaries to absorb glucose and amino acids and a lacteal to absorb fatty acids and glycerol

Question 16

Cilia

Answer 16

Lines trachea and move mucus with trapped bacteria away from lungs

Question 17

How are glucose and amino acids absorbed by the villi

Answer 17

They are taken directly into blood capillaries

Question 18

How are glucose nad amino acids transported around the body

Answer 18

Through the blood stream

Question 19

Why is absorbtion necessary

Answer 19

Resperation