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Lecture Sixteen and Seventeen
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Endocrine v. Nervous System
Endocrine:
control of activities requiring duration>speed → long lasting
Nervous:
rapid, short-acting and precise responses
Endocrine System Organization
Hormones secreted from endocrine glands travel in blood to exert influence on different tissues
What are the six things controlled by hormone control?
Growth+Development, Metabolism, RBC production, core temp, water+electrolyte balance, Reproduction
Primary Endocrine Organs(10)
Pineal, Hypothalamus, Thyroid, Parathyroid, Thymus, Pituitary(Ant/Pit), Adrenal, Pancreas, Reproductive Glands
Secondary Endocrine Organs(6)
Heart, Stomach, Liver, Kidney, Small Intestine, Skin
Diurnal(Circadian) Rhythms
Secretion rate of hormones fluctuating up and down as a function of time
caused by endogenous oscillators(set by the CNS)
Hypothalamic-Pituitary Gland Axis
Neural Connection Posterior Pituitary
Neurosecretory cells in the Hypothalamus are stimulated which propagates a signal to the Anterior Pituitary to release hormones into the capillaries
Supraoptic Nucleus
cell that secretes oxytocin
Paraventricular Nucleus
cells that secreate Antidiuretic hormone(ADH)
Hormones of Posterior Pituitary
Antidiuretic Hormone(ADH)
water balance/osmolarity
released from paraventricular nucleus
Oxytocin
released from supraoptic nucleus
sperm movement, bonding, milk letdown