fish respiration lab Flashcards
what is poikilotherms
internal temperature varies and adapts to enviromental stress
what are hemotherms?
maintains the internal body temperautre under influence of enviroment conditions
mammals/metabolic activites (shivering)
what are ectotherms
reptile/amphibian
relies primarily on external enviroment to regulate temperature of body
what are endotherms
birds
able to regulate body temp by producing heat within the body
what is the q10 principle
measure of the degree to which a biological process depends on temperature.
what does it mean when the Q1O =1
the rxn is not temperature sensitive
what does it mean when the q10=3
the reaction rate triples w/ each 10 degree rise in temp
what does it mean when the q10=2
the reaction rte doubles with each 10 degree increment
what happens to the enzymes at high temperature
it denatures
is the oxygen consumption higher or lower when there is a cold adaptive curve.
the cold adaptive curve has higher oxygen consumption compared to the warm adaptive curve.
How do goldfish adjust their metabolic rates when exposed to different temperatures over different time scales
how do fish change their metabolic rate
- expression of different isoforms of enzymes
- change the amount of an enzyme that is expressed to compensate the change in T
how is the change in Vo2 shown
it is increasing progessively with the temperature
At higher temperature, the amount of dissolved oxygen:
Decreases
What long-term process do diploid fish use to keep physiological processes operating at relatively constant rates despite chronic fluctuations in ambient temperature?
They up or downregulate the amount of an enzyme that is expressed in order to compensate for changes in temperature.
How does temperature influence metabolic rate acutely and chronically?
When the temperature is changed from hot to cold it changes the acute temperature change, increasing the metabolic rate. Chronically takes a longer time to see temperature change so with the temperature influence we can see a much slower steady incline of the metabolic rate.
Why is the relationship between enzyme activity and temperature is relevant for understanding the physiology of poikilothermic organisms like goldfish?
As temperature rises , the enzyme activity rises with it, there is a time where the temperature denatures the enzyme. Since Poikilothermic animals internal temp varies considering to to their environments, the effect of such high temperature can help show what occurs to the enzyme activity of an animal that can change their internal temp based on environment instead of metabolic activity.
