Heat Production In Ectotherms And Endotherms

Question 1

What are the two ways ectothermic animals can produce heat?

Answer 1

Muscular activity- shivering

Futile substance recycling

Question 2

In insects what does the thorax heat up to in order to fly?

Answer 2

35 degrees to heat the muscles

Abdomen temp doesn’t increase

Question 3

How do bumble bees remain warm?

Answer 3

They have a counter-current exchange going on where the warm blood from the thorax passes the cold blood in the abdomen

Question 4

How do bumble bees prevent themselves from over heating?

Answer 4

They by pass the countercurrent system by not having the fluids pass each other, instead they pulse it in different directions when they are hot and want to remove heat

Question 5

What is futile substance recycling?

Answer 5

Insects can recycle a certain substance during metabolism which produces heat

Question 6

What is the issue with blood going to the gills in ectothermic fish?

Answer 6

They’re in contact with the water, so heat is easily lost

Question 7

How are tuna different to normal ectothermic fish?

Answer 7

They have a different arrangement of blood vessels
There is blood going in against blood going out

Heat that is produced from the muscle is maintained within that muscle because of the counter-current systems that are taking place