fish respiration lab

Question 1

what is poikilotherms

Answer 1

internal temperature varies and adapts to enviromental stress

Question 2

what are hemotherms?

Answer 2

maintains the internal body temperautre under influence of enviroment conditions

mammals/metabolic activites (shivering)

Question 3

what are ectotherms

reptile/amphibian

Answer 3

relies primarily on external enviroment to regulate temperature of body

Question 4

what are endotherms

birds

Answer 4

able to regulate body temp by producing heat within the body

Question 5

what is the q10 principle

Answer 5

measure of the degree to which a biological process depends on temperature.

Question 6

what does it mean when the Q1O =1

Answer 6

the rxn is not temperature sensitive

Question 7

what does it mean when the q10=3

Answer 7

the reaction rate triples w/ each 10 degree rise in temp

Question 8

what does it mean when the q10=2

Answer 8

the reaction rte doubles with each 10 degree increment

Question 9

what happens to the enzymes at high temperature

Answer 9

it denatures

Question 10

is the oxygen consumption higher or lower when there is a cold adaptive curve.

Answer 10

the cold adaptive curve has higher oxygen consumption compared to the warm adaptive curve.

Question 11

How do goldfish adjust their metabolic rates when exposed to different temperatures over different time scales

Question 12

how do fish change their metabolic rate

Answer 12

1. expression of different isoforms of enzymes
2. change the amount of an enzyme that is expressed to compensate the change in T

Question 13

how is the change in Vo2 shown

Answer 13

it is increasing progessively with the temperature

Question 14

At higher temperature, the amount of dissolved oxygen:

Answer 14

Decreases

Question 15

What long-term process do diploid fish use to keep physiological processes operating at relatively constant rates despite chronic fluctuations in ambient temperature?

Answer 15

They up or downregulate the amount of an enzyme that is expressed in order to compensate for changes in temperature.

Question 16

How does temperature influence metabolic rate acutely and chronically?

Answer 16

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.

Question 17

Why is the relationship between enzyme activity and temperature is relevant for understanding the physiology of poikilothermic organisms like goldfish?

Answer 17

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.