Midterm - Lecture 2 Flashcards

1
Q

Through what dietary components do animals get energy?

A

fat, protein, and carbohydrates

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2
Q

How is energy measured?

A

in joules or calories

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3
Q

What is the definition of a calorie?

A

the energy required to raise the temperature of 1 g of water from 16.5 to 17.5 degrees C

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4
Q

What is the equivalent of 1 calorie in joules?

A

4.184 joules

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5
Q

What is 1000 calories equivalent to?

A

1 kcal

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6
Q

What is 1000 kcal equivalent to?

A

1 mcal

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7
Q

What is the equivalent of 1 kg in pounds?

A

2.2 pounds

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8
Q

What is 1 mg/kg equivalent to?

A

1 ppm

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9
Q

What is the equivalent of 1 lb in grams?

A

454 grams

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10
Q

What is the equivalent of 1 lb in ounces?

A

16 ounces

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11
Q

What is the equivalent of 1 oz in grams?

A

28.33 grams

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12
Q

What is the maintenance energy?

A

the energy expended to maintain the animal

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13
Q

How is maintenance energy calculated?

A

K(kgBW^(3/4))

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14
Q

How does direct calorimetry work?

A

an animal goes into a sealed chamber and all heat produced over a period of time is measured

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15
Q

How does indirect calorimetry work?

A

calculates heat that living organisms produce based on their consumption of oxygen

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16
Q

What is gross energy good for finding?

A

how much energy needs to come from feed to gain weight, grow a pound in fetal growth, or to make a liter of milk

17
Q

What is gross energy equivalent to?

A

net energy

18
Q

What is digestible energy?

A

gross energy - gross energy in feces

19
Q

What is metabolizable energy?

A

gross energy - feces - urine - gases

20
Q

What are energy requiring processes?

A

maintenance, pregnancy, lactation, exercise, adaptation to hot or cold environments, growth

21
Q

How is gross energy traditionally calculated?

A

a bomb calorimeter

22
Q

What is the gross energy constant for fat?

A

9.4 kcal GE/g

23
Q

What is the gross energy constant for protein?

A

5.7 kcal GE/g

24
Q

What is the gross energy constant for carbohydrates?

A

4.1 kcal GE/g