Gas Exchange - Amphibians

Question 1

Aside from the lungs, what other type of respiration is common in amphibians?

Answer 1

Cutaneous respiration

Question 2

What respiratory organs do amphibians use in the larval form?

Answer 2

External gills

Question 3

What respiratory organs do amphibians use in the adult form?

Answer 3

Lungs

Question 4

What type of breathing do bullfrogs use?

Answer 4

Buccal force pump

Question 5

What is the glottis?

Answer 5

A valve in frog lungs

Question 6

What is the first step of the respiratory cycle of bullfrogs?

Answer 6

Air enters the buccal cavity, the glottis is closed, buccal cavity expands

Question 7

What is the second step of the respiratory cycle of bullfrogs?

Answer 7

The glottis opens, chest cavity compresses and forces the old air out

Question 8

What is the third step of the respiratory cycle of bullfrogs?

Answer 8

Lung pressure drops, the nares close, floor of the buccal cavity rises and forces the new air into the lungs

Question 9

What is the fourth step of the respiratory cycle of bullfrogs?

Answer 9

The glottis closes, new air is trapped inside the lungs and gas exchange occurs

Question 10

Why are frogs called intermittent breathers?

Answer 10

They can vary the amount of air they breathe out depending on their needs

Question 11

What is an inflation breath? What step in the respiratory cycle is this done?

Answer 11

The frog reduces the amount of air it breathes out. Occurs in step 2

Question 12

What is an deflation breath? What step in the respiratory cycle is this done?

Answer 12

The frog increases the amount of air it breathes out. Occurs in step 2