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Chemical Signals 2

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Chemical Signals 2. BIOL 1407. Endocrine Glands. Hormone-secreting cells make up endocrine system Ductless glands Secrete into blood Receptors on target cells. Hypothalamus-Pituitary Axis. Hormones Released from Posterior Pituitary. Relationship of Hypothalamus and Anterior Pituitary. - PowerPoint PPT Presentation
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Chemical Signals 2 BIOL 1407
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Page 1: Chemical Signals 2

Chemical Signals 2

BIOL 1407

Page 2: Chemical Signals 2

Endocrine Glands

• Hormone-secreting cells make up endocrine system

• Ductless glands• Secrete into blood• Receptors on

target cells

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Page 4: Chemical Signals 2

Hypothalamus-Pituitary Axis

Page 5: Chemical Signals 2

Hormones Released

from Posterior Pituitary

Page 6: Chemical Signals 2

Relationship of Hypothalamus and Anterior

PituitaryHypothalamus

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Levels of T3/T4 fall below minimum range

Receptor on Hypothalamic Neuron

Example: Control of Release of T3/T4

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Thyroid Gland

• Calcitonin – Ca regulation

• T3 and T4

– Metabolic rate– Other effects:

• Nervous

• Reproductive

• Muscle

• Heart & blood pressure

• Digestive system

• Development• Diagram Credit: US Government, Wikimedia Commons

Page 13: Chemical Signals 2

T3/T4: Tadpole Metamorphosis

Page 14: Chemical Signals 2

Control of Ecdysis

• Ecdysis in Crustacean: http://www.youtube.com/watch?v=qACc82n6ODE

• Photo Credit: Macau500, 2004, Wikimedia Commons

Page 15: Chemical Signals 2

Brain Hormone (BH) = PTTH

(Prothoracicotropic Hormone)

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The End

Unless otherwise specified, all images in this presentation came from:

Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.


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