BIOLOGY 2A03 Chapter Notes - Chapter 6: Secretion, Anterior Pituitary, Thyroid
11 Feb 2016
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Document Summary
Endocrine (transporting hormones throughout the blood) and nervous systems are two long-distance communication systems in the body: control systems that regulate our physiology. Because they are delivered in the blood stream, hormone actions have a slower onset but are longer-lasting than neural signals. Table: compare and contrast nervous and endocrine systems. Endocrine glands: secrete hormones directly into the ecf (in contrast to exocrine glands (digestive system) secrete products to the outside, derived from epithelial tissue. Dopamine neurotransmitter and hypothalamic hormone that inhibits prolactin secretion (milk breakdown) Norepinephrine and epinephrine neurotransmitter and adrenomedullary hormones released by the adrenal glands. Successive enzymatic steps convert tyrosine to each catecholamine. Particular catecholamine secreted by an endocrine organ depends on the presence and activity of the appropriate enzymes: other amines. Serotonin neurotransmitter and hormone derived from tryptophan that is involved in sleep, supressing stress responses, and mood. Thyroid hormones t4 = thyroxine, t3 = triodo-thyronine.
