PSYC 365 Lecture Notes - Lecture 16: Endocrine System, Muscle Tissue, Epigenetics
18 Oct 2017
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Document Summary
Females have more influence on sex-linked traits because of their pair of x"s: genetic factors, physiological processes, sex hormones, brain differences. Sex-linked traits = traits that are controlled by genes on the chromosomes. Y-chromosome possessed by men contain sry (sex-determining region) gene determines male sex and male fertility during prenatal period. X-chromosome has larger impact due to large number of genes. Epigenetics = changes in gene expression caused by factors other than dna. Meta-analysis (1998) women more sensitive to pain; difference linked to levels of estrogen and testosterone. Hormones = chemical substances produced by the endocrine system. Hormone levels affect behavior at two major stages of development: prenatal . Organizing effects level of hormone at prenatal level; can cause relatively permanent changes: puberty (during or after, metabolism, drug absorption, muscle tissue males have more, body fat males have lower percentages. Gonads (ovaries and testes), pituitary, thyroid, and adrenal glands. Androgens manufactured by stress; group of male hormones.
