PHSL 310 Lecture Notes - Lecture 2: Circadian Rhythm, Circadian Clock, Pineal Gland
Document Summary
Two cells link via membrane bound messenger growth, differentiation, cells function. 1. 2 processes related to homeostasis: adaptation: survival in specific environment, acclimatization: improved functioning of existing homeostatic system; not fixed; enhanced by prolonged exposure; reversible to normal, sweat test: day 1 person sweats when exposed to heat and exercise. By day 8, person starts sweating far before exercise starts. Biological rhythms: circadian rhythm: cycles once every 24 hours waking, sleeping, body temp, hormones, excretion, homeostatic mechanisms used fast and automatic by activating when something is likely to occur but before it happens. In vitro: experiment done within test tube or petri dish. In vivo: experiment done on cells within the body. Chemical terms: atomic number: number of protons; equal to number of electrons, atomic mass: atom"s relative mass relative to mass of other atoms. Ions: when atoms gain/lose electrons: losing electrons means that the next innermost shell would become outermost= stable, ex.
