Gas Exchange

Question 1

Fish and Inverts

Answer 1

Have gills

Question 2

Insects

Answer 2

Have a tracheal system

Question 3

Most animals

Answer 3

Have lungs

Question 4

Birds

Answer 4

Have a lung/airsac system, most efficient system

Question 5

Lungs

Answer 5

Functional unit of the lungs is the alveolus

Question 6

Alveolus

Answer 6

300 mill/lung in clusters like grapes, outer surface of alveoli is densely vascularized

Question 7

Elasticity and surface tension

Answer 7

The elasticity of alveoli and the surface tension of H20 film cause the lungs to tend to collapse

Question 8

Surfactant

Answer 8

Decreases the work of breathing, it is secreted into fluid lining inner surface of alveoli, it lowers the surface tension

Question 9

Rate of inflation of lungs with surfactant

Answer 9

1 millimeter of Mercury

Question 10

Rate of inflation of lungs without surfactant

Answer 10

25 millimeters of Mercury

Question 11

Max expiratory effort

Answer 11

100 millimeters of Mercury

Question 12

Max inspiratory effort

Answer 12

80 millimeters of Mercury

Question 13

Diaphragm

Answer 13

Quiet breathing is achieved by movements of this, when you inhale the diaphragm moves down and then you exhale via passive recoil

Question 14

Heavy breathing

Answer 14

Rib muscles raise and lower rib cage

Question 15

Forced exhale

Answer 15

adds abdominal muscular contraction