Gas Exchange

Question 1

Cellular respiration requires _ to produce _.

Answer 1

O2, CO2

Question 2

_ _ provides a means of supplying an organism with CO2 and removing the O2.

Answer 2

Gas exchange. Substitute CO2 and O2.

Question 3

What are the two sources of oxygen?

Answer 3

1) Air
2) Water

Question 4

The air is about _% oxygen and _ at higher altitudes.

Answer 4

21, thinner

Question 5

The amount of oxygen in water varies and is always greater than air.

Answer 5

False. Lower.

Question 6

The amount of oxygen in water is _ in warm temperatures, and is harder to _

Answer 6

lower, ventilate

Question 7

The structure of the gas exchange surface depends on…

Answer 7

1) The organism’s size
2) Where the organism lives
3) The metabolic demands of the organism

Question 8

What are the four types of gas exchange surfaces?

Answer 8

1) External gills
2) Internal gills
3) Lungs
4) Tracheae

Question 9

Fish gills are covered by a/an _.

Answer 9

operculum

Question 10

For fishes, gas exchange occurs at the _

Answer 10

gills

Question 11

As water enters the mouth of a fish, the operculum is _.

Answer 11

closed

Question 12

As water exits a fish, the mouth _ and the operculum _.

Answer 12

closes, opens

Question 13

A fish gill is made of _ bony _ _.

Answer 13

four, gill, arches

Question 14

These are thin and flat structures that line a gill arch in hundreds.

Answer 14

Gill filaments.

Question 15

Gill filaments have folds called _ that contain a network of _.

Answer 15

lamellae, capillaries

Question 16

Blood flows through the blood capillaries in the same direction to the flow of water.

Answer 16

False. Opposite direction.

Question 17

Gills have a large _ _.

Answer 17

surface, area

Question 18

The thinness and close contact between gills allow for a _ _ _.

Answer 18

short, diffusion, distance

Question 19

Gills have a high _ _ to bring _ and release _.

Answer 19

blood, supply, CO2, O2

Question 20

What is gas exchange?

Answer 20

The diffusion of gasses from a higher to lower concentration.

Question 21

It is the process in which plants and other organisms exchange different gasses with the environment.

Answer 21

Gas exchange

Question 22

How do plants obtain the gases they need?

Answer 22

Through their leaves.

Question 23

Plants require _ for respiration and _ for photosynthesis.

Answer 23

O2, CO2

Question 24

Plants have specialized structures for gas exchange.

Answer 24

False.

Question 25

In small plants, gases can move in and out via _.

Answer 25

diffusion

Question 26

In complex plants, gas exchange is done through the _ on leaves, stems, and roots.

Answer 26

stomata

Question 27

The opening and closing of the stomata can be in response to _ moving in/out the cell as well as light and low _ _ levels.

Answer 27

water, internal, CO2

Question 28

What happens to the turgor of the cell when water comes in?

Answer 28

It increases, causing them to lengthen and open the stomata.

Question 29

During the day, there is a net production of _ and a net consumption of _.

Answer 29

O2, CO2

Question 30

During the night, there is a net production of _ and a net consumption of _.

Answer 30

CO2, O2