BIOL 1080 Study Guide - Final Guide: Circadian Rhythm, Glycerol, Cervical Cancer

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23 Apr 2017
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Lecture 10: p. 162-173 (important figures: 2, 10 and 13) The endocrine system (es) coordinates growth, development and reproduction. Lipid-soluble: include steroid hormones (secreted by ovaries, testes, adrenal glands: move easily through plasma membrane. Bind to receptor inside cell: water-soluble: include proteins, peptides. Feedback mechanisms and secretion of hormones: ho(cid:373)eostasis: keeps (cid:271)od(cid:455)(cid:859)s i(cid:374)ter(cid:374)al e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)t relati(cid:448)el(cid:455) (cid:272)o(cid:374)sta(cid:374)t, achieved through negative feedback (i. e. insulin levels, blood calcium levels, sometimes hormones are regulated by positive feedback (i. e. childbirth-oxytocin) How do nervous and endocrine interact: nerves release neurohormones to blood, nerve signals via neurotransmitters can modulate hormone secretion, neuron in cns and pns have receptors for hormones. Pituitary gland: size of a pea, connected to hypothalamus which regulates body temperature, sleeping and water balance, anterior and posterior, anterior is larger, secretes releasing (more secretion)/inhibiting hormones (less secretion) Releases gh (stimulate growth, faster rates of cell division) Too little gh in children = pituitary dwarfism.

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