the endocrine system. nervous system vs. endocrine system nervous system endocrine system speed of...
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The Endocrine System
Nervous System vs. Endocrine SystemNervous System
Endocrine System
Speed of Action?
How Long do the Effects Last?What is Used as a “Signal”?
How Far Does the Signal Travel?
Hormones
• Hormones are _______________ produced and secreted by endocrine organs into the ___________.
• 2 Classes of Hormones:– 1. _____________ Hydrophilic or Hydrophobic?
– 2. _____________ Hydrophilic or Hydrophobic?
Bloodstream
Target Cell
Endocrine Organ Protein
Hormone
Receptors
cAMP
Figure 9.1b, step 1
CytoplasmNonsteroidhormone (firstmessenger)
Receptorprotein
Plasmamembraneof target cell
Figure 9.1b, step 2
CytoplasmNonsteroidhormone (firstmessenger)
Enzyme
Receptorprotein
Plasmamembraneof target cell
Figure 9.1b, step 3
CytoplasmNonsteroidhormone (firstmessenger)
Enzyme
Receptorprotein
Secondmessenger
Plasmamembraneof target cell
ATP
cAMP
Figure 9.1b, step 4
CytoplasmNonsteroidhormone (firstmessenger)
Enzyme
Receptorprotein
Secondmessenger
Effect on cellular function,such as glycogenbreakdown Plasma
membraneof target cell
ATP
cAMP
Endocrine Organ Bloodstream Steroid
Hormone
Figure 9.1a, step 1
NucleusCytoplasmSteroidhormone
Plasmamembraneof targetcell
Figure 9.1a, step 2
NucleusCytoplasmSteroidhormone
Plasmamembraneof targetcell
Figure 9.1a, step 3
NucleusCytoplasmSteroidhormone Receptor
protein
Hormone-receptorcomplex
Plasmamembraneof targetcell
Figure 9.1a, step 4
NucleusCytoplasmSteroidhormone Receptor
protein
Hormone-receptorcomplex
DNA
Plasmamembraneof targetcell
Figure 9.1a, step 5
NucleusCytoplasmSteroidhormone Receptor
protein
Hormone-receptorcomplex
DNA
mRNA
Plasmamembraneof targetcell
Figure 9.1a, step 6
NucleusCytoplasmSteroidhormone Receptor
protein
Hormone-receptorcomplex
DNA
mRNANewprotein
Plasmamembraneof targetcell
Hormones Work by Negative Feedback
How Do Endocrine Glands Get Stimulated?
Neural StimulationHormonal
Stimulation Humoral Stimulation
