Lecture 1/2 Flashcards

1
Q

What is one MET?
( __mLs of O2/kg/min)

A

Two definitions:
3.5 mLO2/kg/min
or
1kcal/kg/hour

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2
Q

How many MET-hr/week of leisure physical activity are there diminishing returns for years of life gained after age 40?

A

21 MET-hr/weeks is where returns are diminished, just after 4 years of life gained

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3
Q

How many kcal is 1lb of fat?

A

3,500 kcal

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4
Q

List a few uses of fat

A

-Energy storage
-Physical/cold protection
-Vitamin absorption
-Maintain cell membranes

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5
Q

Desirable health body fat % for men and women

A

Men: 7-18%
Women: 18-27%

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6
Q

Respiratory quotient (RQ)

A

Ratio of CO2 produced to O2 consumed

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7
Q

Triglyceride structure

A

3 fatty acids and 1 glycerol

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8
Q

True or False: All substrates can be converted to fats or used as energy

A

True

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9
Q

Metabolic substrate conversion:
-Fatty acids
-Glucose
-Proteins

A

Fatty acids ->Acetyl CoA
Glucose -> Pyruvate
Proteins -> Amino acids

All then to C.A.C.

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10
Q

1g of urinary nitrogen (N) excreted represents:
__ g of protein metabolized
__ L of O2 consumed
__ L of CO2 produced

A

6.25 g of protein metabolized
6.0 L of O2 consumed
4.8 L of CO2 produced

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11
Q

Glucose metabolism formula

A

C6H12O6 +6O2 -> 6CO2 + 6H2O
glucose + oxygen -> carbon dioxide + water

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12
Q

What does an RQ above 1.0 mean?

A

More CO2 is being produced than oxygen consumed, indicating anaerobic exercise

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13
Q

RQ: CHO vs. Fat Vs. Protein

A

Fat: 0.7
Protein: 0.8
Carbs: 1.0

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