生理化学（Physiological chemistry）.docVIP

生理化学（Physiological chemistry） (3) highly effective biological amplification; (4) synergistic or antagonistic effects among hormones. Four, the hypothalamus endocrine function 1. endocrine cells: Large cell neuroendocrine: as nucleus, paraventricular nucleus, nerve fibers projecting to the pituitary gland, vasopressin and oxytocin secretion. Neurosecretory small cell: secreting various releasing hormones or releasing inhibitory hormones, and reaching various target cells of the pituitary gland through the portal vein of hypophysis. 2. the chemical nature of hypothalamic hormones: both peptide hormones. 3. regulation of hypothalamic hormone secretion (1) feedback regulation: This is the main mode of adjustment. It includes long feedback of target hormones, short feedback of the pituitary hormone, and ultrashort feedback of hypothalamic hormones. (2) the regulation of neurotransmitter in brain: 5-HT, acetylcholine, norepinephrine and so on. 4. hypophyseal portal system This is the basis of connection between hypothalamus and pituitary gland, including double capillary network, the first level in the median eminence of the pituitary stalk, second in the anterior pituitary, hypothalamus pituitary gland hormones regulate hormone release through the portal system, and pituitary hormone through the portal system play feedback modulation. Five, pituitary function 1. kinds of pituitary hormones: The pituitary gland is the most important endocrine gland, secreting at least seven hormones, including GH, PRL and MSH respectively, no target gland growth regulation, mammary gland development, black cell function; while TSH, ACTH, FSH, LH by target gland function. 2. the role and regulation of auxin: (1): 1. The growth promoting effect of childhood: lack of suffering from dwarfism, excessive suffering gigantism, acromegaly with excessive auxin in adulthood. The role of metabolism: to accelerate the synthesis of protein, promote fat decomposition. At physiological levels, auxin incr