Describe the ways in which organisms exchange heat with thei

Describe the ways in which organisms exchange heat with their environment and compare and contrast those ways among animals with differing thermal strategies such as homeotherm and poikilotherm or endotherm and ectotherm.

Solution

ANS:

The body temperature of animal kingdom is regulated in two extremes. They are

1. Endothermic (homeotherms)

Ex: Most mammals, humans and birds.

2. Ectothermic (poikilotherms)

Ex: most fish, invertebrates, reptiles, and amphibians

Some animals fit into both endothermic poikilotherm and ectothermic homeotherm profile.

Homoeotherm: The animals which maintains constant internal body temperature.

Poikilotherm: The internal temperature of the animal is varies; usually it is resulted by variation in environmental temperature.

Ectotherm: An animal internal body temperature regulation is depends on external environment.

Endotherm: The internal body temperature is regulated by metabolic processes. They primarily produce their own heat.

Homeotherm (endotherm) and Poikilotherm (ectotherm):

Homeothermy: In which the body temperature of an organism more or less constant over a range of environmental temperature.

Heat is generated through their own metabolism, so these are called endotherm.

Poikilothermy: In which the body temperature of an organism changes with change in environmental temperature.

Gets heat from environment, so these are called ectothermal.