Physiology 1021 Lecture Notes - Lecture 23: Folliculogenesis, Blastocyst, Follicular Phase

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

Document Summary

Radiaion: transfer of heat down concentraion gradient (mainly from the sun) Conducion: transfer of heat from physical contact (direct touching) Both contribute to heat input and heat loss (if it is a cold object) Homeostaic regulaion of normal body temperature (range of 36-38 degrees) Metabolic acivity: generated as a by-product of cellular respiraion. Shivering: heat generated by mass muscle contracions **generates most heat** Non-shivering thermogenesis: heat is generated by hormonal regulaion. Heat conservaion (vasoconstricion): constricing blood low, decrease blood low so less blood reaching the surface so the blood stays within. Convecion: 35% heat loss, transfer of heat by air currents. Thermoreceptors sense absolute and relaive changes in temperature, peripheral outside the brain like the skin, tongue, urinary or inside the brain cns. Hypothalamus pre-opic hypothalamus simulated by increase in temperature. Posterior hypothalamus indirectly simulated by cold temperature, no thermoreceptors present indirectly simulated no thermoreceptors itself. Fever is response of body to increase temperature to denature bacteria.