Physiology 1021 Lecture Notes - Lateral Hypothalamus, Sexual Dimorphism, Osmotic Concentration

• School: Western University
• Department: Physiology
• Course: Physiology 1021
• Professor: John Ciriello

Document Summary

Nerve fibres innervate cardiac and smooth muscle + glands. Sympathetic nervous system: fight or flight . All release ach dilate blood vessels. Sns release ne and e constrict blood vessels. Hypothalamus produces hormones from anterior pituitary gland (not part of the brain) Adh (vasopressin): anti-diuretic hormone activated with salt change in the plasma osmolarity. Release of milk (post labour) and contractions (labour) Vasopressin thirsty h2o intake diluting blood decrease osmolarity. Increase osmolarity (water leaves cells shrink (hypertonic) Decrease blood volume (atria stretch receptor activated increase. Lateral hypothalamus + ventromedial = energy intake regulation. Leptin is released from fat tissues signal to brain if you"ve ate enough or not enough. Increase in leptin activates satiety centre (arcuate nucleus + Decrease in leptin activates feeding centre (lateral hypothalamus + paraventricular nucleus) eat. Excess fat in blood stream insulin resistance, hyper tension Thermoregulation: homeostatic regulation od normal body temperature interplay with physiological + external factors.