BIOL10004 Lecture Notes - Lecture 20: Positive Feedback, Homeostasis, Enzyme
30 Jul 2018
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Body temp too low: metabolism slows, body functions disrupted. Body temp too high: enzyme function destroyed, proteins denature. What determines body temp? body and another ie growth & reproduction. Active animals body temp ranges from -2degrees to 80 degrees: metabolism, positive feedback, heat exchange with environment prevents from bursting into flames. Increase in body temp increases metabolic rate. Conduction eat is exchange via direct connection between animals. Convection cooler air currents remove heat from body. Evaporation cooling occurs when water evaporates. Radiation thermal radiation from sun to animal / animal to sun. Use behavioural & physiological mechanisms maintain body temp. Body temp kept in optimal range for body functions. Can(cid:495)t use (cid:494)cold-blooded(cid:495) and (cid:494)warm-blooded(cid:495) as it doesn(cid:495)t always work. Ambient temperature range of environment is appropriate for survival. Equilibrate to whatever ambient temp environment is. Relies on external sources of heat to determine body temperature. Can generate own body heat via metabolic heat production.
