Chemical Classes of Hormones

Chemical Classes of Hormones - Endocrine System Chemical...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Endocrine System Chemical Classes of Hormones Water –soluble Hormones * Monoamine (biogenic amines) hormones- synthesized by modifying certain amino acids * Catecholamines- (made from tyrosine) epinephrine, norepinephrine, and dopamine * Histamine- from histadine by mast cells and platelets * Serotonin and melatonin- from tryptophan * Peptide and protein hormones- synthesized on the rough ER and consist of chains 3-200 amino acids * Ex: Thyroid-stimulating hormone (TSH) Chemical Classes of Hormones Eicosanoid hormones- chemical mediators derived from arachidonic acid (a 20-carbon fatty acid) located in the phospholipids in the plasma membrane * leukotrienes- mediates allergic reactions * derived from the enzyme lipoxygenase action on arachidonic acid cyclooxygenase converts arachidonic acid to three other types of eicosanoids * Prostacyclin- produced by the walls of blood vessels, where it inhibits blood clotting and vasoconstriction * Thromboxanes- produced by blood platelets * in the event of injury, they override prostacyclin and stimulate vasoconstriction and
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

Page1 / 2

Chemical Classes of Hormones - Endocrine System Chemical...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online