B6A11Coordinate

Fallopian tubesuterusvagina epididymusvas

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Unformatted text preview: nes • Islet cells produce hormones • a-cells ‡ glucagon • b-cells ‡ insulin • d-cells ‡ somatostatin – Secreted via capillaries into bloodstream Neuroendocrine Glands • Gametes secreted via sexual accessory ducts. – Fallopian tubes/uterus/vagina – Epididymus/vas deferens/urethra • Sex steroids secreted into bloodstream. Some endocrine glands have both neural and epithelial components. Adrenal gland Ad-renal: “ over the kidney” Fishes have inter-renal gland • Modified axon termini • Secrete messenger into bloodstream (neurohormone) instead of into synaptic cleft (neurotransmitter). • Inner region: medulla – neural • Outer region: cortex – epithelial • Outermost covering: capsule – tough connective tissue {Pituitary gland also has both neural and epithelial components. } Adrenal Gland Adrenal Gland Adrenal cortex • Secrete steroid hormones: cortico steroids/corticoids Adrenal medulla • Modified sympathetic postsynaptic neurons • Secrete epinephrine (adrenaline) & norepinephrine (noradrenaline) as hormones instead of as neurotransmitters. • Extend “fight-or-flight response to whole body. • Three sub-regions: • outer layer ‡ mineralo corticoids humans: aldosterone – regulate salt balance • middle layer ‡ glucocorticoids humans: cortisol – regulate sugar balance and chronic stress response • inner layer ‡ sex steroids androstenedione & DHEA – weak androgens Heyer 6 Coordination of Body Function...
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This note was uploaded on 09/02/2011 for the course BIOL 6a taught by Professor Staff during the Fall '10 term at DeAnza College.

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