BIO202H5 Lecture Notes - Lecture 2: Aquatic Animal, Mass Diffusivity, Polyphenism
Document Summary
Homeostasis: how do animals respond to limitations structurally or functionally: homeostasis dynamic mechanisms regulate many parameters such as temperature, ph, dissolved oxygen, glucose (regulation of internal environment) Homeostasis: conformers vs. regulators: conformers internal environment varies with the external environment, regulators . If it very cold, body will produce more heat vs. if you are not cold, body will produce less heat. If you are not hungry, your body will not think about food, vs. you are hungry, glucose levels will drop, your body will want food. Antagonistic controls: your body temperature is held relatively constant by antagonistic loops. If cold conditions cause a decrease in your body temperature, this triggers an increase in heat production and a. Positive feedback does not lead to regulation: not homeostasis, e. g. childbirth. When baby is ready, body contractions begin. If feedback doesn"t stop, it is dangerous for the body. Phenotypic plasticity: reversible and irreversible, environment determines shape.
