Excretion And Osmoregulation

Question 1

What are the three forms of excretion?

Answer 1

Ammonia (lots of water)
Urea (some water)
Uric acid (excreted dry)

Question 2

What are the three basic conditions of the hindgut?

Answer 2

General condition
Liquid feeder
Water stress

Question 3

What structures carry oxygen to the tissues and CO2 away?

Answer 3

Trachea

Question 4

How does air enter into the insect?

Answer 4

Spiracles

Question 5

What are taenidia?

Answer 5

Spirally arranged cuticular thickenings designed to keep trachea open

Question 6

What is the most metabolically active tissue?

Answer 6

The house fly brain

Question 7

What are the four patterns of spiracle placement?

Answer 7

Holopneustic

Hemipneustic (short bodied, spiracle number reduced)

Metapneustic/oligopneustic: single spiracle at tip of abdomen

Apneustic: no spiracles

Question 8

What are Ostia?

Answer 8

Vertical slits in the heart where blood is drawn in under negative pressure

Question 9

Is oxygen carried in the blood?

Answer 9

No it’s carried in the trachea