lecture_4 - Classification of hormones: Three main types of...

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Classification of hormones: Three main types of hormones: 1. Peptide hormones - three or more amino acids 2. Steroid hormones - derived from cholesterol 3. Amine hormones - derived from single amino acids They differ on the basis of synthesis, storage, release, transport, and cellular mechanisms of action
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Table 7-1
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Figure 7-3 - Overview Peptide hormones
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Figure 7-4a
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Figure 7-4b
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Figure 7-4c
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Figure 7-5 Surface receptor Hormone binds Transduction Enzyme activation Open channels Second messenger systems Synthesis Peptide hormone signaling
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Figure 7-5 Peptide hormone signaling Peptide hormone: a.Transport water soluble quickly degraded short half-life b. Action membrane receptor signal transduction quick response
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Synthesized from cholesterol Lipophilic - enter target cell through membrane Cytoplasmic or nuclear receptors (mostly) Activate or surpress DNA (gene transcription) for protein synthesis Slower acting, longer half-life
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lecture_4 - Classification of hormones: Three main types of...

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