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Unformatted text preview: this include many signaling molecules Autocrine
Paracrine Cell in Another
Dependent soma terminal Presynaptic
Cell Mechanisms of Hormone Action
this slide summarize hormone affect cell. hormone fall into 2 categories: Hydrophilic
Hormones vs. Lipophilic
Thyroid 1. hormones that are peptides, proteins, or amines are hydrophilic hormones
upper left corner is signaling by hydrophilic hormone where hormone bind to plasma membrane receptor and act through second messenger system usually to alter activity of preexisting enzymes
or ion channels and ultimately gene expression to cause a response.
2. lipophilic hormones such as steroids and thyroid. down at the bottom, the arc on the left are cell membrane. the arc on the right are nuclear membrane.
the second signaling pathway is the lipophilic hormones that cannot cross the plasma membrane in large amounts. lipophilic hor...
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This document was uploaded on 03/09/2014 for the course EXSC 301 at USC.
- Spring '09