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Sample test questions 1
Terms in this set (37)
The three major macronutrients necessary for supplying energy are:
Carbohydrates, Lipids, and Protein
The largest reserve of glycogen found in the body
How much lipid intake does the average American get in their daily caloric intake
more fat than they actually need
Quantity of heat needed to raise temperature of 1kg (1L) of water 1C:
At water general factor for dietary carbohydrate:
4Kcal per gram
General factor for dietary fat:
4Kcal per gram
General factor for dietary protein:
9Kcal per gram
Process that catabolizes carbohydrates, lipids, and proteins into simpler forms that the body absorbs and assimilates:
Hydrolysis=catabolism means breakdown
A loss of electron with a gain in valence occurs in _______ reactions
What does reduction mean?
GAIN of electrons
Direct calorimetry measures what?
it measures heat and is more accurate; expensive
Indirect calorimetry measures what?
oxygen consumption; gives you an estimate; inexpensive
During exercise of increasing intensity, when oxygen supply is limited, pyruvate gains 2 hydrogens atoms and becomes ______ to lactate
Respiratory chain and the Krebs cycle are always what?
go hand in hand; will always be together
Which of the following occurs in the mitochondria?
Phosphocreatine, under maximal effort, can produce an energy yield for:
less than 10 seconds
Citric acid cycle:
- An acetyl group joins with oxaloacetate to produce citrate
- FAD is involved in only one operation in the cycle
- the formation of acetyl CoA from pyruvate is irreversible
False statement about the citric acid cycle:
oxygen directly participates in the reactions
What is the most important function of the citric acid cycle
generate electrons (hydrogens)
What substrate possesses the most plentiful source of potential energy?
fatty acids (more CH bonds)
A triglyceride molecule possesses
1 glycerol and 3 fatty acids
Which process is responsible for breaking down fatty acids
Fatty acids can NEVER be used to make glucose
Which statement is false concerning metabolism
Excessive fatty acid levels can contribute to glucose synthesis
the enzyme LDH in FAST TWICTH muscle fibers favors the conversion of ______ to _______:
pyruvate -- lactate
In the trained state, an individual's blood lactate threshold occurs at a ______ when compared to their untrained state
higher relative work load
An individuals increased capacity for aerobic exercise may be due to what adaptations:
-increased capillary density
-more rapid lactate clearance
-decreased lactate production
the flat portion of the oxygen consumption curve is usually called:
the oxidation of this fuel allows slow twitch fibers to contract for extended periods of time
Fatigue during prolonged running is associated most strongly with depletion of:
The liver may convert lactate to glycogen, this process is called:
Another word for recovery oxygen;
Is training based on how you feel
At rest, lactate:
Is cleared as quickly as it is generated
What term quantitatively expresses the difference between the total oxygen consumed during exercise and the total that would have been consumed had steady-state aerobic metabolism been reached from the start?
What is the main source for replenishing glycogen following prolonged aerobic exercise?
Manipulating exercise and rest intervals is done to _____ specific energy transfer systems
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