week 13 Respiration

Question 1

Why do living animals need oxygen? To make ________________ in the form of _____________
during the ____________ ___________________ __________ in the
_________________(organelle) of a cell.

Answer 1

To make ADENOSINE in the form of ATP during the process of CELLULAR RESPIRATION in the MITOCHONDRIA

Question 2

In which organs of the respiratory system of amniotes and most adult amphibians does oxygen
and carbon dioxide exchange by diffusion take place?

Answer 2

lungs

Question 3

How do animals living in the water (for example, fish, tadpoles) acquire oxygen? (in other words,
what organs do they have for gas exchange?)

Answer 3

gills

Question 4

Fish take in oxygen by opening their mouth and allowing oxygenated water in. When they close
their mouth, the oxygenated water moves over their ___________ and back out with the
surrounding water.

Answer 4

gills

Question 5

Some invertebrates such as flatworms don’t have lungs or gills. How do they acquire oxygen?

Answer 5

Diffusion

Question 6

How do animals living in the water (for example, fish, tadpoles) acquire oxygen? (what organs
do they have for gas exchange?

Answer 6

gills

Question 7

In adult amphibians such as frogs, how do they get air into their lungs?

Answer 7

through nostrils, into air sacs then pushed into the lungs.

Question 8

What is a diaphragm? Do mammals have one? Do fish or amphibians or most reptiles have one?

Answer 8

A diaphragm sheet of muscle that separates the chest cavity and abdomen. Yes mammals do. No amphibians and reptiles.

Question 9

In the lung tissue, lung cells are super thin and lie right up against blood capillaries. By what
process does gas exchange take place across lung cells to and from blood capillaries?

Answer 9

diffusion