Lesson 4

Question 1

Describe difference between gas exchange systems of juvenile and adult amphibians

Answer 1

Adult - Diffusion across moist skin when at rest and when active, use lungs
Juvenile - Gills as they are aquatic

Question 2

What is:
External intercostal muscles?

Answer 2

When these contract, ribs pulled up and out

Question 3

Larynx?

Answer 3

Box-shaped structure above trachea which contains vocal cords

Question 4

Bronchiole?

Answer 4

Bronchi branch into these smaller tubes for air

Question 5

Alveoli?

Answer 5

Main site of gas exchange at the end of bronchioles

Question 6

Bronchi?

Answer 6

2 large tubes from trachea and splits further into bronchioles

Question 7

Surfactant?

Answer 7

Prevents alveoli from sticking together an collapsing

Question 8

Trachea?

Answer 8

Largest tube

Question 9

Ribs?

Answer 9

Bonds moved by intercostal muscles and alter size of thorax

Question 10

Diaphragm?

Answer 10

Dome-shaped muscle that can alter size of thorax

Question 11

Pleural cavity?

Answer 11

Contain pleural fluid

Question 12

Epiglottis?

Answer 12

Flap of skin to prevent food from entering trachea when seallowing

Question 13

Pleural fluid?

Answer 13

Acts as lubricant to allow friction-free movement between lungs and inner wall of thorax during ventilation

Question 14

Thorax?

Answer 14

Contains and protects vital organs

Question 15

Explain the purpose of C-shaped rings of cartilage

Answer 15

Prevent collapsing of trachea, bronchi, and bronchioles during inspiration when pressure is low