Exam 3 Start: Hormones, respiration, and circulation Flashcards
(17 cards)
central nervous system anatomy will probably be in class quiz or next exam
What is body cavity of insect called?
Hemocoel (hemo-seal)
What is insect blood called? How much of the insects body weight is it?
Hemolymph
20-40%
What is the difference between and insect and vertebrate
- no gas exchange
- no acquired immunity
- no respiratory pigment (hemoglobin is red)
Is the insect circulatory open or closed?
open
Some facts abt the insect heart
gets pumped forward 2 the brain
tubular heart -> hose that squirts @ the brain
Dorsal
What are their blood cells called and what do they function in
- Hemocytes
- Coagulation
- Immune response
(antibacterial molecules and encapsulate parasites)
Does an insect immune system produce antibodies?
No
High concentration of
- organic phosphates
-amino acids - peptides
- include carrier molecules for a lipophilic compound
What is the molting hormone, where is it secreted from?
- Ecdysone (a steroid)
- prothoracic gland
He said we should know what a steroid looks like
(steroid backbone?)
What does juvenile hormone (JH) do and from where is it release?
- what kind of molt it will be
-metamorphosis - keeps organism in a juvenile state
- Corpora allata
- terpene (lipo)
How much JH is present during the last molt (becoming adult)?
None or very low
What are the basic steps of molting
- Apolysis: detach old cuticle
- New cuticle forms
- Ecdysis (shedding of the cuticle)
Layer of the cuticle
interpret graph w the kissing bugs
