psych106-15

psych106-15 - Lecture 15 (Feb 22nd ): Hormones and Sexual...

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Lecture 15 (Feb 22 nd ): Hormones and Sexual Behavior Lecture Outline 1) Organs / Glands / Hormonal Communication 2) Sex Hormones: “Male” vs. “Female” 3) “Genetic Gender” (XX, XY) 4) Organizing Effects of Sex Hormones in Utero and Anomalies 5) Sexual Orientation in Humans 6) Other Things to Know about on your own: * Puberty * Mating Behaviors Parenting Behaviors -> You can SKIP for now since you are young.
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Exocrine Glands : Secrete “stuff” locally: sweat, saliva, breast milk Hormones have global, and often long-lasting, effects Endocrine Glands : Secrete HORMONES into the blood In contrast to: Neurotransmitters that have local, short-lived, effects Hormones carried in blood to other organs of the body where they inFuence cell activity (e.g., metabolic rate) But, some Hormones are also Neurotransmitters: Adrenaline (Epinephrine) and Noradrenaline (Norepinephrine) …… later in course Non-Glands Organs = Body Parts Glands Exocrine Endocrine
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Endocrine (Hormone-Releasing) Glands Adrenal Cortex Part of the
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Control of Hormone Release: Hypothalamus & Pituitary (Master Endocrine) Gland a) Anterior Pituitary : Neural projections from Hypothalamus ( in purple ) release hormones into Portal System ( blood vessels between hypothalamus and pituitary) b) Posterior Pituitary : Neural projections from Hypothalamus (in green ) release hormones into bloodstream of Posterior Pituitary, that are then released into the general bloodstream. In response, Ant. Pituitary releases its own hormones into general bloodstream. Pituitary hormones affect other endocrine glands, causing them to release their own hormones. Hypothalamus Hypothalamus Pituitary
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Two Major Types of Hormones - attach to receptors in the cytoplasm - receptor-hormone complex enters nucleus Steroid Hormones (this lecture and next week) - diffuse across cell membrane - triggers gene expression -> very long-lasting effects Protein/Peptide and AA Derivative Hormones (next week) - attach to receptor on cell membrane - activate 2 nd messenger system inside cell - alters metabolism of cell -> effects last for minutes or hours
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- Sex Hormones (this lecture) Steroid Hormones - Cortisol (next week) Two Main Types of Sex Hormones 1) Androgens e.g., Testosterone (TTT) (higher levels in males) 2) Estrogens e.g., Estradiol (higher levels in females)
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psych106-15 - Lecture 15 (Feb 22nd ): Hormones and Sexual...

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