In some cases, an animal is both Endothermic and Ectothermic!
For example: a bird ECTOTHERMICALLY warms itself in the sun but it is ENDOTHERMIC for a majority of the time
For example: a bird ECTOTHERMICALLY warms itself in the sun but it is ENDOTHERMIC for a majority of the time
Ectothermic: animal (Ectotherm) warmed by taking advantage of the external envrionment
for example: reptiles, amphibians
EXAMPLE 1: Thermoregulatory Behavior (Dragonfly)
standing in a tall "obelisk" posture exposes the least amount of body surface to the sun's radiation as possible, reducing heat
for example: reptiles, amphibians
EXAMPLE 1: Thermoregulatory Behavior (Dragonfly)
standing in a tall "obelisk" posture exposes the least amount of body surface to the sun's radiation as possible, reducing heat
EXAMPLE 2: Hibernation (Polar Bear)
The polar bear puts itself under a deep sleeping spell during the winter months in order to lower its metabolism. This conserves energy while the weather is harsh and the food supply is low
The polar bear puts itself under a deep sleeping spell during the winter months in order to lower its metabolism. This conserves energy while the weather is harsh and the food supply is low
Endothermic: animal (Endotherm) warmed through metabolism
for example: land animals, birds, etc
EXAMPLE 1: Insulation
1. Environment becomes colder
2. Nervous System detects a drop in the animal's body temperature and stimulates the skin to raise fur, trapping an air layer and strengthening the fur's insulation
3. Animal's body temperature increases
4. Nervous System detects a healthy body temperature and sends signals to the skin to return to its normal state.
NOTE: human goosebumps are remnants of insulation techniques used by hairy ancestors
EXAMPLE 2: Evaporation
1. Environment becomes warmer
2. Nervous System detects an increase in the animal's body temperature and stimulates the skin to release sweat, moistening the skin and enhancing evaporation.
3. The sweat absorbs heat and carries it away with evaporation, causing a decrease in body temperature.
4. Nervous System detects a healthy body temperature and sends signals to the skin to return to its normal state.
for example: land animals, birds, etc
EXAMPLE 1: Insulation
1. Environment becomes colder
2. Nervous System detects a drop in the animal's body temperature and stimulates the skin to raise fur, trapping an air layer and strengthening the fur's insulation
3. Animal's body temperature increases
4. Nervous System detects a healthy body temperature and sends signals to the skin to return to its normal state.
NOTE: human goosebumps are remnants of insulation techniques used by hairy ancestors
EXAMPLE 2: Evaporation
1. Environment becomes warmer
2. Nervous System detects an increase in the animal's body temperature and stimulates the skin to release sweat, moistening the skin and enhancing evaporation.
3. The sweat absorbs heat and carries it away with evaporation, causing a decrease in body temperature.
4. Nervous System detects a healthy body temperature and sends signals to the skin to return to its normal state.