L3 - The hot croc Flashcards
What is the thermal physiology of crocodiles?
Crocodiles are ectothermic, meaning their body temperature matches the environment.
What’s the difference between ectotherms and endotherms?
Ectotherms depend on external temperature, while endotherms regulate their internal body temperature.
How does temperature affect biochemical reactions?
Higher temperatures increase enzyme activity and reaction rates, but only up to a certain point.
What is the Q10 rule?
Biological reaction rates double for every 10°C temperature increase, up to a limit.
Why is oxygen consumption a measure of metabolism?
Oxygen is used in cellular respiration, indicating energy use.
How do ectotherms react to cold temperatures?
Their metabolism slows, and biochemical reactions decrease.
How is ATP used in muscle contraction?
ATP splits to provide energy for muscle fibers to contract.
What does the sarcomere do during muscle contraction?
The sarcomere shortens when myosin pulls actin filaments in.
How does temperature affect muscle performance?
Higher temperatures improve muscle efficiency by increasing enzyme activity and reducing blood viscosity.
What happens to biological systems at very high temperatures?
Enzyme denaturation occurs, leading to system failure.
How would you study the effect of temperature on biochemical reactions?
Choose a species, measure biochemical processes, and manipulate temperature.
What are the two flows in biochemistry?
The flow of energy (ATP use) and the flow of information (gene expression and signaling).
Why is the Notothenioid icefish important for temperature studies?
It survives in cold temperatures, making it ideal for studying cold adaptation.
What would you study in a temperature investigation?
Choose a species and focus on enzyme activity, muscle performance, or oxygen consumption.
