in the following image which question is correct and Which is incorrect BIO 361

Question

in the following image which question is correct and Which is incorrect

BIO 361 FINAL VERSION B NAME: 17. How can we quantify metabolic rates in organisms? We should only use heat calorimetry for all-sized animals because it is the least expensive and the easiest to use to quantify metabolic rates. b.) we can use consumption because the heat produced per unit oxygen cons is pretty similar for all three types of foodstuff. vc) We can use the respiratory exchange ratio to quantify metabolic rate. vd.) We can also use material balance measurements since they only require quantifyi weight of the food that goes in and the weight of the feces that come out as long as do it over a long time and account for an organism growing and storing energy. e) We can measure metabolic rate right after an organism ingests a meal to quantify i basal or standard metabolic rate. 18. Which statements about the distribution of energy are correct, which incorrect?

Explanation / Answer

17. Quantifying metabolic rates in organism:

Metabolism is inefficient and produces heat. There are two types of animals present: Endotherms use metabolic heat to keep a stable body temperature, other one is ectotherms, which do not.

a) Heat Calorimetry is associated with determining the changes in energy of a system by measuring the heat exchanged with the surroundings. Metabolic rate can be measured most directly, as the rate of heat energy released from an animal's body. So this option is a correct choice.

b) Metabolic rate change with the heat energy released from an animal's body is also correlated directly with heat production: rate of oxygen consumption. This is a correct choice too.

c) The respiratory exchange ratio (RER) is determined by comparing exhaled gases to room air. There is a condition associated with it as this estimation is only valid if metabolism is in a steady state. So this option could be chosen.

d) Metabolic balance measurement: This cannot be used to show the metabolic rates in organisms. This option should not be chosen.

e) The "baseline" metabolic rate of an animal is measured as the BMR for an endotherm or as the SMR for an ectotherm. But in case of calculation we do in post-absorptive state, or when our digestive system is inactive. Here this option is incorrect as it has suggested using it right after meal.

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