insect excretory system main purpose
removal of nitrogenous waste and water and ion balance
what deals with removal of nitrogenous waste?
malpighian tubules are
long thin tubes that float in hemocoel have lots of trachea
what type of arrangement do malpighian tubules have?
what are the two main regions of excretory systems?
malpighian tubules and rectal glands
to use amino acid insect must remove
what are the two ways of ridding of nitrogenous wastes?
amonotelic and uricotelic
pure ammonia (keep it dilute)
uricotelic insects convert
ammonia to uric aacid
what do blattaria use uric acid for
their uricose glands use uric acid from body and coat spermatophore with uric acid and then give to female
diuretic hormone acts on
reduces active transport of na into rectal glands, insects pee more
increases active transport of na into rectal glands, insects don't pee
increases movement of hind gut less time to reabsorb h2o, increases elimintation
malpigian tubue/hindgut complex use active transport to move
na and k from hemolymph into tubule water flows passively, it brings other solutes with it (except hormones)
active transport to move solutes from rectum to hemolymph for reabsorbtion