15 Questions
Which of the following best defines temperature?
A measure of the speed or intensity of the random motions of atoms and molecules in a substance
What is the relationship between temperature and heat?
Temperature determines the direction of heat transfer
Which of the following is true about ectotherms?
They rely mostly on external temperatures to determine body temperature
What is the purpose of transpiration in plants?
To cool the plant
What is the relationship between endotherms and ectotherms?
Endotherms generate internal heat, while ectotherms rely mostly on external temperatures to determine body temperature
Which of the following is true about compensation in plants?
Compensation requires a shift away from the acute response.
What happens to the metabolic rate of plants without compensation?
The metabolic rate increases with increasing temperature.
What is the role of enzyme isoforms in compensation?
Enzyme isoforms allow for the fine-tuning of metabolism.
How does compensation work in terms of enzyme abundance?
Compensation involves increasing the amount of enzymes to compensate for reduced efficiency at lower temperatures.
What contributes to compensation in terms of enzyme activity?
Changes in enzyme microenvironment and viscosity.
Which equation represents the relationship between metabolic rate (M), temperature (T), and constants (a, b, and n) for an ectotherm?
$M=a10^{nT^b}$
What is the temperature coefficient (Q10) defined as?
The ratio of the rate of a process at one temperature over the rate of the same process at a temperature 10°C lower
Which of the following is true about the temperature-metabolic rate relationship?
It is not exactly exponential and the impact of a change in temperature varies with temperature
What is the relationship between enzyme-substrate affinity and Km?
Low Km = high affinity
What is the maximum rate of reaction (Vmax) defined as?
The maximum rate of reaction
Test your knowledge of temperature and its importance in biology and physiology with this quiz. Explore the principles of thermal biology and ectothermy, as well as how temperature sets limits on where organisms can live and function.
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