Insect gas exchange
1.
2.
3.
Name: ..............................................................
/15
Name each of the following:
i.
The holes in the exoskeleton which are used for gas exchange ....................................
ii.
The reinforced tubes which carry air into an insects body ..........................................
iii.
Smaller tubes which deliver air to the muscle cells ....................................................
[3]
Which process in a muscle cell:
i.
Requires energy ......................................................................................................
ii.
Requires oxygen and releases energy in the form of ATP ..........................................
iii.
Releases lactic acid ................................................................................................
iv.
Draws water into muscle cells .................................................................................
[4]
Complete the following:
Insects are covered by a waxy exoskeleton. This is …………………………… to water but also
prevents the …………………………… of gases. They have evolved a series of tubes which carry
air deep into their bodies. Some of these tubes are enlarged to form …………………………….
These can be …………………………… so that the air in them is pushed further into the body.
This pressure is generated by closing the …………………………… and pulling the plates of the
…………………………… closer together using abdominal muscles.
4.
[6]
Insects rely mainly on diffusion for gas exchange. Explain why insects are relatively small.
......................................................................................................................................
......................................................................................................................................
5.
[1]
How do insects avoid losing too much water?
......................................................................................................................................
......................................................................................................................................
[1]