BISC 101 Chapter Notes -Bile Acid, Yolk, Sphingomyelin
17 Sep 2012
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Document Summary
Major lipid component of cell membranes; constituent of plasma. Constituent of all animal cells, blood, and nervous tissue; precursor of bile salts, vitamin d, and steroid hormones. Substances that emulsify or suspend fats before their digestion and absorption; needed for absorption of fat-soluble vitamins (a, d, e, k) Produced in skin on exposure to uv radiation; necessary for bone growth, development, and repair. Sex hormones produced in large quantities by females. Sex hormones produced in large quantities by males. Membrane-associated lipids that stimulate uterine contractions, induce labour and abortions, regulate blood pressure, transmit nerve impulses, regulate metabolism, regulate stomach secretions, inhibit lipid breakdown, and regulate muscular contractions of the gastrointestinal tract; mediates hormones. Pigment in egg yolk, carrots, and tomatoes; vitamin a is formed from carotenes; retinene, formed from vitamin a, is a photoreceptor in the retina of the eye.
