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Hypofyse insufficiens, skjoldbrruskkirteln og stofskiftet - Alma

Hypofyse insufficiens, skjoldbrruskkirteln og stofskiftet - Alma

Hypofyse insufficiens, skjoldbrruskkirteln og stofskiftet - Alma

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Regulering af antallet af<br />

receptorer<br />

• Hver celle har mellem 2000 <strong>og</strong> 10.000 receptorer.<br />

• Hvis underskud af hormoner, øges antallet af<br />

receptorer, <strong>og</strong><br />

• hvis overskud af hormoner, mindskes antallet af<br />

receptorer.<br />

• Dette kaldes for hhv. op- <strong>og</strong> nedregulering af<br />

receptorer.<br />

• På denne måde kan cellerne “trimme” deres egen<br />

aktivitet.<br />

• Desuden kan cellens receptorfølsomheden<br />

ændres!

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