Eg. dilation of the cervix during childbirth
Positive fee
The result of many positive increases o
feedback loops is death :)
Temperature
Water potential A constant internal environment consisting of
factors is maintained despite changed in Homeo
pH external environment
Blood glucose level
Examp
Cannot increase respiration
Organism which
rate to increase internal
regulates body temp
production of heat-
with help from external
dependent on external energy
source
sources Ectotherms
Control heat by exchanging heat with surroundings (eg. basking in sun
or increasing breathing rate for heat loss via evaporation of water)
Both have physiological or Thermoregu
To restore optimum temp. (NEGATIVE FEEDBACK)
behavioral responses
Contain thermoreceptors to monitor
Able to maintain constant
core body temp changes +
body temp. not dependent Endotherms
communicate them to hypothalamus
on external temp. Responses
creating an appropriate response
Basking in/moving away from sun
Moving to hot/cool surface
Both endotherms Panting
AND exotherms
respond like this Vasoconstriction/dilation
Hibernation
Positive fee
The result of many positive increases o
feedback loops is death :)
Temperature
Water potential A constant internal environment consisting of
factors is maintained despite changed in Homeo
pH external environment
Blood glucose level
Examp
Cannot increase respiration
Organism which
rate to increase internal
regulates body temp
production of heat-
with help from external
dependent on external energy
source
sources Ectotherms
Control heat by exchanging heat with surroundings (eg. basking in sun
or increasing breathing rate for heat loss via evaporation of water)
Both have physiological or Thermoregu
To restore optimum temp. (NEGATIVE FEEDBACK)
behavioral responses
Contain thermoreceptors to monitor
Able to maintain constant
core body temp changes +
body temp. not dependent Endotherms
communicate them to hypothalamus
on external temp. Responses
creating an appropriate response
Basking in/moving away from sun
Moving to hot/cool surface
Both endotherms Panting
AND exotherms
respond like this Vasoconstriction/dilation
Hibernation
