functionalorganizationoftheendocrinesystemcombined messenger activation receptor in plasma membrane...

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1 2 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Neuron Nerve impulse Neurotransmitter Target cells Target cells (b) Endocrine system (a) Nervous system Endocrine cells Hormone in bloodstream 3 4 5 6

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Page 1: FunctionalOrganizationOfTheEndocrineSystemCombined messenger activation Receptor in plasma membrane Target cell Hydrophilic hormone 19 20 21 22 ... Thyroxine, insulin O Th. McGraw-Hill

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Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Neuron

Nerve impulse

Neurotransmitter

Target cells

Target cells

(b) Endocrine system

(a) Nervous system

Endocrine cells

Hormone in bloodstream

3  4 

5  6 

Page 2: FunctionalOrganizationOfTheEndocrineSystemCombined messenger activation Receptor in plasma membrane Target cell Hydrophilic hormone 19 20 21 22 ... Thyroxine, insulin O Th. McGraw-Hill

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Page 3: FunctionalOrganizationOfTheEndocrineSystemCombined messenger activation Receptor in plasma membrane Target cell Hydrophilic hormone 19 20 21 22 ... Thyroxine, insulin O Th. McGraw-Hill

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Page 4: FunctionalOrganizationOfTheEndocrineSystemCombined messenger activation Receptor in plasma membrane Target cell Hydrophilic hormone 19 20 21 22 ... Thyroxine, insulin O Th. McGraw-Hill

Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Blood

Transport protein

Free hormones

Bound hormone

Hydrophobic hormone

Tissue fluid Receptor in nucleus

Second- messenger activation

Receptor in plasma membrane

Target cell

Hydrophilic hormone

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Page 5: FunctionalOrganizationOfTheEndocrineSystemCombined messenger activation Receptor in plasma membrane Target cell Hydrophilic hormone 19 20 21 22 ... Thyroxine, insulin O Th. McGraw-Hill

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(a) 4 weeks

(b) 8 weeks (c) 16 weeks

Future hypothalamus

Telencephalon of brain

Neurohypophyseal bud

Hypophyseal pouch

Pharynx

Tongue

Mouth

Hypothalamus

Optic chiasm

Posterior lobe

Anterior lobe

Sphenoid bone

Pharynx

Pituitary stalk

Hypothalamus

Pharynx

Hypophyseal pouch

Future thyroid gland

Neurohypophyseal bud

Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

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Page 6: FunctionalOrganizationOfTheEndocrineSystemCombined messenger activation Receptor in plasma membrane Target cell Hydrophilic hormone 19 20 21 22 ... Thyroxine, insulin O Th. McGraw-Hill

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