PSYC 280 Lecture Notes - Lecture 5: Thyroid, Posterior Pituitary, Anterior Pituitary

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 280
• Professor: Neil Watson

Document Summary

Chemical signal is a hormone released into the blood stream to selectively affect distant target organs. The released chemical signal diffuses across synaptic cleft and causes a change in postsynaptic membrane. Released chemical acts on releasing cell and affects its own activity. Released chemical signal diffuses to nearby target cells. Pheromones released into environment to affect other individuals of the same species. Chemical signals released by members of one species to affect behavior of individuals of another species. Flowers have scented allomones to attract insects and birds. Hormones: chemicals secrete by a group of cells and carried through the bloodstream to other parts of the body to produce physiological effects o. Produced by endocrine glands (release hormones inside the body) and exocrine glands (secrete fluids outside the body) The scientific method established the importance of testicular hormones. Early in the fourth century they aristotle discovered that testes were important to reproductive capacity and sexual characteristics.