Gas Exchange

Question 1

the process by which a respiratory gas is transferred from the atmosphere to bodily tissues for use in metabolism ; and the gas produced by metabolism is transferred from tissues to the atmosphere.

Answer 1

Gas exchange

Question 2

Gas exchange occurs at __________ in the body of an organism

Answer 2

Two sites

Question 3

in the ______________, where Element X is picked up and Element Y is released,

Answer 3

Respiratory organ

Question 4

at the _______________, where Element X is released and Element Y is picked up.

Answer 4

Cells/tissue

Question 5

_______________________ vary from different organisms.

Answer 5

Element X and Element Y

Question 6

The conditions for gas exchange vary considerably, depending on the respiratory medium; which could be Air or Water.

Answer 6

Respiratory media

Question 7

_______ is much less dense and less viscous than water, so it is easier to move and to force through small passageways.

Answer 7

Air

Question 8

breathing __________ is relatively easy and need not be particularly efficient.

Answer 8

Air

Question 9

___________ lower O2 content, greater density, and greater viscosity mean that ____________ animals must expend considerable energy to carry out gas exchange.

Answer 9

Water’s, aquatic

Question 10

Types of Respiratory Organs (for animals)

Answer 10

Direct Diffusion
Skin
Gills
Tracheal System
Lungs

Question 11

It is a type of respiration of simple animals where every cell in the body is close enough to the external environment that gases can diffuse quickly between any cell and the environment.

Answer 11

Direct Diffusion

Question 12

It is an integumentary organ that serves as a respiratory organ.

Answer 12

Skin

Question 13

Dense network of capillaries just below the skin facilitates the exchange of gases between the circulatory system and the environment.

Answer 13

Skin

Question 14

outfoldings of the body surface that are suspended in the water.

Answer 14

Gills

Question 15

gills often have a total ________________ much greater than that of the rest of the body’s exterior.

Answer 15

Surface area

Question 16

gills often have a total ________________ much greater than that of the rest of the body’s exterior.

Answer 16

Surface area

Question 17

For _______________, diffusion through the tracheae brings in enough O2 and removes enough CO2 to support cellular respiration.

Answer 17

Small insects

Question 18

____________________ meet their higher energy demands by ventilating their tracheal systems with rhythmic body movements that compress and expand the air tubes like bellows.

Answer 18

Larger insects

Question 19

It is a network of air tubes that branch throughout the body within an organism (Insects).

Answer 19

Tracheal system

Question 20

These are localized respiratory organs that are subdivided into numerous pockets through infoldings of its surface area.

Answer 20

lungs

Question 21

What is the respiratory organ of Sponges
Cnidarians
Flatworms?

Answer 21

Direct diffusion

Question 22

What is the respiratory organ of Earthworms and Amphibians?

Answer 22

Skin

Question 23

What is the respiratory organ of Marine Life?

Answer 23

Gills

Question 24

What is the respiratory organ of insects?

Answer 24

Tracheal system

Question 25

What is the respiratory organ of Vertebrates that live on land and Marine mammals?

Answer 25

Lungs

Question 26

___________ have no specialized organs for gas exchange (with the few inevitable exceptions, i.e. stoma).

Answer 26

Plants

Question 27

____________________________________ takes care of its own gas exchange needs. Although plants have an elaborate liquid transport system, it does not participate in gas transport.

Answer 27

each part of the plants

Question 28

_____________________________ respire at rates much lower than are characteristic of animals

Answer 28

Roots, stems, and leaves

Question 29

Only during ____________________ are large volumes of gases exchanged, and each leaf is well adapted to take care of its own needs.

Answer 29

photosynthesis

Question 30

Each living cell in the plant is located close to the ______________.

Answer 30

surface

Question 31

While obvious for leaves, it is also true for stems. The only living cells in the stem are organized in ________________ just beneath the bark

Answer 31

thin layers

Question 32

The cells in the interior are dead and serve only to provide ________________________

Answer 32

mechanical support

Question 33

Most of the living cells in a plant have at least part of their surface exposed to air. The loose packing of _________________________ in leaves, stems, and roots provides an interconnecting system of air spaces.

Answer 33

parenchyma cells

Question 34

__________ diffuse through air several thousand times faster than through water.

Answer 34

Gases

Question 35

Once ________________________________ reach the network of intercellular air spaces, they diffuse rapidly through them.

Answer 35

oxygen and carbon dioxide

Question 36

Oxygen and carbon dioxide also pass through the _____________________________ of the cell by diffusion.

Answer 36

cell wall and plasma membrane

Question 37

The diffusion of carbon dioxide may be aided by ________________________ inserted in the plasma membrane.

Answer 37

aquaporin channels

Question 38

Plants have ________________________________ for gas exchange (with the few inevitable exceptions!)

Answer 38

no specialized organ

Question 39

The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called ____________________.

Answer 39

stomata (leaves)