BIOL 1080 Chapter Notes - Chapter week 3 material: Extracellular Fluid, Signal Transduction, Cell Membrane
Document Summary
Responsible for runny nose and red watery eyes associated with allergic reactions. In inflammation, histamine increases blood flow to affected tissues and causes to leak out of blood vessels into the tissue. Special group of hormones released by neurosecretory cells. Secreted by endocrine glands, released into interstitial fluid and then diffuse into blood, which distributes them to target cells throughout the body\ Does not dissolve in plasma but crosses plasma membrane lipophobic: pertaining to a molecule that is water soluble (not lipid soluble); hydrophilic. Does dissolve in plasma but does not cross the plasma membrane. Amino acid messengers: examples: glutamate, glycine, gaba, amino acids that are classified as chemical messengers function as neurotransmitters in brain and spinal cord, are lipophobic. Amine messengers: chemical messengers derived from amino acids all posses an amine group called catecholamines (-nh2) catecholamines: amine compounds that contain a catechol group (6 carbon ring) and are derived from the amino acid tyrosine.