Bio Notes February 19

Bio Notes February 19 - Bio Notes February 19, 2009

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Bio Notes February 19, 2009 d’ Exam Review: Thurs 2/26 5:15-6:30 Rm 119 Fri 2/27 3:40-5:00 Rm 138 Hypothalamus and pituitary gland work together to regulate growth, metabolism, reproduction, response to stress, and many other processes: Posterior Pituitary Hormones, Regulation Neuroendocrine cells in the hypothalamus release neurohormones directly into the posterior lobe of pituitary Neurohormones (Oxytocin (uterus, stimulates contraction) (mammary glands, stimulates milk release), ADH (kidney tubules- increases permeability- increased water reabsorption)) are packaged in secretory vesicles stored at the axon ends Stimulation releases neurohormones directly into the portal circulation (capillaries) to provide end organ stimulation NB: insufficient ADH- don’t concentrate urine: diabetes insipidus (ANS) Fig 48-8 Anterior Pituitary Regulation Releasing hormones and inhibiting hormones secreted by the hypothalamus Regulate hormone output of anterior lobe of pituitary gland o Acts as a traditional endocrine organ o Stimulation or inhibition by hypothalamic hormones leads to Anterior Pituitary secretion o End organ reaction Fig 48-9 Gonadotrophic hormones- LH and FSH important in both male and female reproduction Releases: MSH (pigment cells in skin), Prolactin (produce milk in mammary glands), Gonadotrophic Hormones (produce gametes in both sexes) Thyroid Stimulating Hormones (increases rate of metabolism), ACTH (regulate fluid balance, helps body cope with stress), Growth Hormone (promotes growth) o Melanocyte-stimulating hormones (MSH)- Also secreted by some neurons in the hypothalamus Amphibians and reptiles responsible for skin darkening In mammals its also responsible for suppressing of appetite Helps regulate energy and body weight o Prolactin Stimulates mammary glands to produce milk In fish and amphibians maintains salt balance o Growth Hormone (GH, somatotropin) An anabolic hormone that stimulates body growth Induces liver to produce insulin like growth factors (IGFs), promotes skeletal growth, and general tissue growth Growth regulation occurs during deep sleep, during exercise, and
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This note was uploaded on 10/08/2010 for the course BIO 380 taught by Professor Martin during the Spring '10 term at Rutgers.

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Bio Notes February 19 - Bio Notes February 19, 2009

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