KINE 2031 Lecture Notes - Lecture 7: Sympathetic Nervous System, Growth Hormone, Egg Cell

• School: York University
• Department: Kinesiology & Health Science
• Course: KINE 2031
• Professor: Neil Smith

Document Summary

Tropic hormone: whose primary functions is to regulate hormone secretion by another endocrine gland. Tropic hormones stimulate & maintain their endocrine gland tissue. Ex: tsh (anterior) stimulates thyroid hormone secretion by thyroid gland & maintains structural integrity. Single endocrine gland produces multiple hormones (ex: thyroid gland) More than one endocrine gland may secret single hormone. Single hormone has more than one type of target cell (ex: oxytocin) Rate of secretion of hormones varies over cyclic pattern (ex: menstrual cycle) More than one hormone can influence single target cell. Same chemical messenger can be hormone or neurotransmitter (ex: norep) Negative feedback is prominent feature of hormonal control. Negative feedback maintains plasma concentration of hormone. If plasma concentration of thyroid hormone falls ap secreted tsh stimulates thyroid to secrete thyroid hormone. Thyroid hormone in turn inhibits ap from secreting tsh. Neuroendocrine reflexes include neural & hormonal components. Reflexes produces sudden increase in hormone secretion in response to specific stimuli.