Reactions in which heat flows from the surroundings into the system are called endothermic. Since we observe the "surroundings," endothermic reactions are often detected by noting a decrease in temperature.
A term that describes animals such as mammals and birds that are capable of regulating their body temperature without a heat gradient. Nine tenths of a mammals energy is spent on maintaining a constant temperature, explaining why mammals have a higher metabolism and eat more than reptiles.
endothermy; endotherm animals that use metabolically generated heat to regulate body temperature independently of ambient temperature. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a (now extinct) synapsid ancestor; the fossil record does not distinguish these possibilities. Convergent in birds. animals that generate their own body heat through metabolic processes.
A term used to describe a process or change in which heat is absorbed and that requires high temperature for the initiation and maintenance. For example, melting ice absorbs heat and is, therefore, an endothermic process.
capable physiologically of maintaining a contant body temperature, as humans do; ecto thermic species have body temperatures that change with the temperature of their environment ENSO El Niño Southern Oscillation