BI110 Lecture Notes - Lecture 4: Melatonin, Jet Lag, Homeostasis
Document Summary
E. g. , sleep-wake cycles, body temperature, metabolic processes, cell division, behaviours including mating and foraging for food: biological clock. Composed of set of genes and proteins that oscillate in a regular manner. Track the changing seasons with a tracking photoperiod to determine time of year for behaviour and developmental changes. Creates an anticipatory response to a predicted environmental variable: suprachiasmatic nucleus (scn) Set by direct light input from the eye. Chapter 21: defining life and its origins living environment: displays order. All forms of life are arranged in a highly ordered manner, with the cell being the fundamental unit that exhibits all properties of life: harnesses and utilizes energy. All forms of life acquire energy from the environment and use it to maintain their highly ordered state 3. reproduces. All organisms have the ability to make more of their own kind 4. responds to stimuli.
