Week 6

Question 1

_________ a type of signaling in which a cell produced a signal to induce changes in nearby cells

Answer 1

paracrine

Question 2

_________ a type of signaling where a cell signal released from the cell binds to the same cell

Answer 2

autocrine

Question 3

_________ through the bloodstream to go to a distant cell

Answer 3

endocrine

Question 4

___________ via neuropeptide transmission at the synapse

Answer 4

nervous

Question 5

________ via steroids in the blood

Answer 5

endocrine

Question 6

__________ neurons that secrete endocrine factors

Answer 6

neuroendrocriune

Question 7

what is the negative feedback loop of the internal and external environment

Answer 7

1. internal and external environment
2. neurosecretory cell in CNS released neurohormone
3. exocrine organ acts on target cells
4. target cells activation results in negative feedback on neursecretory cells

Question 8

________ 12% of insects including crickets, beetles, grasshopper, these organisms do not have a pupation stage during metamorphosis

Answer 8

hemimetabolous

Question 9

____________ 88% of insects. These insects have a pupation period during metamorphisis

Answer 9

holometabolus

Question 10

___________ is characterized by new organs, new sin, sexual change

Answer 10

metamorphosis

Question 11

what is the glass tube experiment

Answer 11

this experiment setup allows us to see the new developing tissue. tissue remodeling is coordinated by endocrine factor

Question 12

_________ these cells are involved in neurosecretion and endocrine regulation of Jh and ecdysone.

Answer 12

neurosecretory cells

Question 13

__________ is involved in the production and secretion of prothoracic hormone PTTH

Answer 13

corpus cardiacum

Question 14

_________ produced juvenile hormone

Answer 14

corpus allatum

Question 15

______________ act on the proithoraicc gland which produces _________

Answer 15

PTTH and JH

Ecdysone

Question 16

___________ characterized a molting phase

Answer 16

ecdysone

Question 17

__________ characterized stages of feeding

Answer 17

Jh surge

Question 18

___________ is a surge in JH and ecdysone. This commits the insect to metamorphisis

Answer 18

commitment peak

Question 19

________ remain low until it is time to reproduce

Answer 19

JH

Question 20

what are the necessary behaviors for ecdysis

Answer 20

1. loosen cuticle
2. shed old cuticle

*timing for ecdysis is crucial or the animal will suffocate