PHYSCI M140 Study Guide - Final Guide: Diethylstilbestrol, Ambivalence, Hypospadias
3 Jan 2017
School
Department
Course
Professor
Document Summary
Immediate causation: increase in testosterone, critical brain areas in hypothalamus (area x, hbc, man, nucleus ra, tracheal syringeal nucleus) Evolutionary: zw males, females zz, song learning from fathers passed down over generations, singing behavior shared among all species of songbirds. Adaptive function: to attract females (reproductive function), to alert other males/secure territory. Immediate causation: testosterone binds to ar receptors that increases courtship behaviors during breeding season. Developmental: start to show courtship (jan-april) during dry season. Evolutionary: skeletal muscles (gluteal muscles help control legs/jumping behavior), sc muscles on breast lift wings (wingsnaps), evolved protruding back muscle that birds usually do not have. Adaptive function: to attract females through courtship display (females choose males based on adaptations that enable speed, agility, stamina, strength) Primate sexual swellings or human ovulatory cues and copulatory/mate-guarding behavior. Developmental: different timings, swellings happen with estrogen increase and swelling peaks when fertility is highest when estrogen levels are the highest around ovulation (juveniles do not show swelling)
