BI107-Lecture 3
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- gonadotropins
- pituitary hormones that stimulate steroid production in gonads
- Nitric Oxide
- induce aggression in mice
- polygeny
- more than one gene affects behavior
- FosB
- present = maternal care;
- vomeronasal system
- "pit organ" of snakes that contains chemoreceptors
- activation effect
- hormones trigger behavior by binding to receptors (molecule cascade)
- MAOA
- metabolizes serotonin
- Mounting and Lordosis
- behaviors are interchangable
- Phenylketonuria
- lack PAH enzyme; can't metabolize phenylalanine; cognitive impairments
- testosterone
- sperm production, immune suppression, sexual behavior, aggression
- Suprachiasmatic nucleus
- part of hypothalamus receives input from pineal gland
- Fruitless Gene (Fru)
- courtship; inject females with Fru and they court females; increased aggression
- pineal gland
- "clock mechanism"
- pleitropy
- one gene affects more than one behavior
- organizational effect
- hormones stimulate gametes --neural development