U2:KA3 - Metabolic rate Flashcards
What is the metabolic rate of an organism?
The quantity of energy (ATP) consumed per unit time
What can metabolic rate be measured as?
Volume of oxygen consumed per time, carbon dioxide produced per unit time, energy production (increase in temperature) per unit time
What equipment can you use to measure metabolic rate?
Oxygen or carbon dioxide probes, calorimeter or a respirometer
How does a Respirometer work?
The respiring organism takes up oxygen and gives out carbon dioxide, carbon dioxide if absorbed by the soda lime, the total volume of gas within the chamber decreases, the coloured liquid moves up the tube to replace the oxygen used in respiration
What circulatory system does a fish have?
Complete single circuit system
What number of heart chambers does a fish have?
2 total, 1 atrium and 1 ventricle
What circulatory system do reptiles and amphibians have?
Incomplete double heart circuit
What number of heart chambers do reptiles and amphibians have?
3 total, 2 atria and 1 ventricle
What circulatory system do birds and mammals have?
Complete double circuit system
What number of heart chambers do birds and mammals have?
4 total, 2 atria and 1 ventricle
What does increasing metabolic rate result in?
More complex hearts and circulatory systems
What are external abiotic factors which may occur in an animals environment?
Salinity, temperature, pH, light intensity
What are Comformers?
Organisms which cannot maintain a constant internal environment under varying external environment conditions, they’re internal environment is directly dependent upon its external environment
What are regulators?
Organisms which control their internal environment through their metabolism
What are examples of behaviours Comformers do to survive in extreme circumstances?
Reptiles bask in the sun, desert lizards burrow under the sad to cool down, spider crabs lose of gain water to maintain their salinity
