Psychology 2220A/B Lecture Notes - Lecture 9: Depressant, Morphine, Headache

• School: Western University
• Department: Psychology
• Course: Psychology 2220A/B
• Professor: Jody Culham

Document Summary

Hormone: an organic chemical messenger released from endocrine cells that travels through the blood system to interact w cells at some distance away & causes a biological response. Endocrine glands: ductless glands; secrete hormones into bloodstream (eg pituitary gland) Exocrine glands: ducts (eg sweat glands, mammary glands & scent glands) Some hormones respond to more than 1 target & some targets are affected by > 1 hormone. Hormones: released from gland, travels through blood & received at distant target organ. Nt: released from presynaptic neuron, travels across synaptic cleft & received at postsynaptic neuron. Hormones affecting behaviour: long-term effects during development (organizational effects) Eg sex difference in posture adult castration does not make male urinate like women. Early testosterone treatment induces females to urinate like males: short-term effects in adulthood (activational effects) e. g. stress response. Behaviour affecting hormones: behaviour & environment can modify internal hormone secretion. Target cells: hormones require receptors to have actions.