Biology 2601A/B Lecture Notes - Lecture 2: Homeothermy, Latent Heat, Poikilotherm
29 Oct 2017
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Temperature 1: principles of thermal biology: small changes in temperature can have great effects on the organisms, especially if the temperatures are on the two extreme ends. Larger object, has more heat, but both have the same temperature: more heat because it is larger, has more molecules, and more mass to store energy in, figure 10. 3: what dictates the temperature of organisms, a. Celsius: q(10) = (cid:4666)(cid:4667) (cid:4666) (cid:2869)(cid:2868)(cid:4667) , r is rate of a process. Metabolic rate: (cid:862)a(cid:374) a(cid:374)i(cid:373)al"s rate of e(cid:374)erg(cid:455) (cid:272)o(cid:374)su(cid:373)ptio(cid:374); the rate at which it converts chemical-bond energy to heat and external work : this rate is determined by enzyme activity, thus metabolic rate is temperature dependent. Relationships between temperature and metabolism: small increase in body temperature exponential increase in metabolism, m = a10ntb. Lots of processes in ectotherms are governed by temperature because all depend on enzymes: activity levels, muscle contraction. Locomotive speed: digestion, growth, germination, photosynthesis, fruit production and ripening.
