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Thermal Biology and Ectothermy Quiz

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Questions and Answers

Which of the following best describes temperature?

The direction of heat transfer
A measure of the speed or intensity of random molecular motions in a substance (correct)
The amount of energy in an object
The limits on where organisms can live and function

What is the relationship between temperature and heat?

Temperature determines the direction of heat transfer (correct)
Temperature and heat are the same thing
Temperature and heat are unrelated
Heat determines the direction of temperature change

Which of the following is true about ectotherms?

They have a constant body temperature
They generate internal (metabolic) heat
They rely mostly on external temperatures to determine body temperature (correct)
They have more than one temperature set point

Which of the following is an example of compensation in organisms?

Changing the abundance of an enzyme (D) Signup and view all the answers

What is the relationship between metabolic rate and temperature without compensation?

Metabolic rate increases with temperature (D) Signup and view all the answers

What is the effect of compensation on the shape of response curves?

The shape of response curves becomes shallower (C) Signup and view all the answers

What is the role of phospholipid membrane changes in compensation?

Maintaining the same viscosity across temperatures (C) Signup and view all the answers

Which equation represents the relationship between metabolic rate (M) and body temperature (Tb) in an ectotherm?

$M = a10^{nTb}$ (D) Signup and view all the answers

What is the temperature coefficient, Q10, used for?

To measure the rate of a process at one temperature over the rate of the same process at a temperature 10°C lower (B) Signup and view all the answers

How does temperature affect enzyme-substrate affinity?

Affinity decreases with temperature (A) Signup and view all the answers