6.1/6.2 Gas Exchange In Insects

Question 1

What is the equation for diffusion?

Answer 1

(Surface Area X Difference in conc) over length of diffusion pathway

Question 2

Does metabolic rate increase with body mass?

Answer 2

Yes

Question 3

Does heat loss increase with body mass?

Answer 3

Yes

Question 4

What is the definition for metabolic demand?

Answer 4

Amount of O2 and minerals needed to respire enough to maintain metabolic rate

Question 5

What are the parts of an insects respiratory system?

Answer 5

Spiracles
Then to a trachea wrapped in chitin
Then to tracheole
Then to tracheoles

Question 6

How does an insects tracheoles allow more air for respiration?

Answer 6

They are full of water
Soluble lactic acid moves in and lowers water potential
Water moves out the cell to allow room for air

Question 7

What can the insects respiratory system do to prevent water loss?

Answer 7

Close its spiricals

Question 8

Where are the spiracle located on an insect?

Answer 8

On the insects exoskeleton