Chapter 6 Flashcards
During maximal exercise the region where oxygen uptake fails to increase despite an
increase in intensity is called:
A) OBLA
B) VO2max
C) lactate threshold
D) point of respiratory compensation
B
Lactic acid in the body:
A) is a metabolic waste product
B) is continually produced
C) can inhibit citric acid cycle metabolism if not deaminated
D) forms from the union of two pyruvate molecules
B
Energy released from ATP and PCr can sustain “all-out” exercise for about:
A) 1 second
B) 8 seconds
C) 1 minute
D) 2 minutes
E) 4 minutes
B
Blood lactate begins to accumulate in an untrained person at ________ % of VO2max.
A) 45
B) 55
C) 65
D) 75
E) 85
B
During relatively light exercise (approximately 40% VO2max) oxygen uptake rises
sharply initially and then:
A) levels off and remains stable at a steady rate
B) decreases sharply to match energy supply
C) decreases toward the resting level after approximately 3-min of exercise
D) None of the answer choices are correct
A
The immediate energy system relies on:
A) reactions of glycolysis
B) intramuscular high-energy phosphates
C) oxygen in the immediate cellular environment
D) oxidation of lactate
E) None of the answer choices are correct
B
_____ relates to anaerobic power capacity.
A) gender
B) muscle fiber type
C) motivation
D) All of the answer choices are correct.
D
The highest levels of blood lactate occur during all-out exercise for:
A) 5 to 10 seconds
B) 30 to 60 seconds
C) 1 to 3 minutes
D) longer than 3 minutes
C
Optimal exercise intensity of active recovery for lactate removal is:
A) 20% VO2max
B) 40% VO2max
C) just below lactate threshold
D) just below VO2max
E) just above lactate threshold
C
Which of the following statements about oxygen deficit and aerobic fitness is TRUE?
A) A trained person reaches a steady-rate more rapidly and thus has a smaller oxygen
deficit.
B) An untrained person reaches a steady-rate more rapidly and thus has a smaller
oxygen deficit.
C) A trained person reaches a steady-rate more rapidly and thus has a larger oxygen
deficit.
D) Trained and untrained individuals reach steady-rate at about the same time during
activity
A
ast-twitch muscle fibers:
A) are rich in LPL
B) possess a high capacity for aerobic production of ATP
C) are resistant to fatigue
D) are activated in short-term sprint activities
D
he most rapid recovery method from steady-rate physical activity is:
A) active recovery
B) passive recovery
C) warm water immersion
D) cold water immersion
B
Oxygen uptake in recovery from intense physical activity reflects which factors caused
by the physical activity?
A) anaerobic metabolism
B) respiratory adjustments
C) thermal adjustments
D) circulatory adjustments
E) All of the answer choices are correct
E
he best indicator to sustain high intensity aerobic physical activity:
A) maximal steady-rate level
B) maximal oxygen uptake
C) maximal oxygen debt
D) maximal oxygen deficit
A
Alactacid debt:
A) represents the fast portion of the recovery oxygen uptake curve
B) represents the slow portion of the recovery oxygen uptake curve
C) indicates the quantity of protein used as fuel
D) resynthesizes lactic acid back to glycogen
E) deoxygenates lactate back to glycogen
A
Success in the 220-yd sprint run requires a highly trained:
A) aerobic energy system
B) lactic acid energy system
C) ATP-PCr energy system
D) lactic acid energy system and ATP-PCr energy system
E) aerobic energy system and lactic acid energy system
D
The ___________ system rapidly phosphorylates ADP to ATP.
A) electron transport-oxidative phosphorylation
B) PCr
C) substrate-level phosphorylation via glycolysis
D) aerobic system
B
Steady-rate physical activity refers to:
A) a metabolic state where hydrogen atoms continually oxidize at their rate of
production
B) a metabolic state where ATP continually regenerates via aerobic pathways
C) a balance between energy required by the body and rate of aerobic ATP production
D) All of the answer choices are correct
D
Which respiratory exchange ratio (R) indicates VO2peak has been achieved during
physical activity?
A) 0.70
B) 0.85
C) 1.00
D) >1.00
D
f physical activity intensity exceeds the steady-rate level, ______ becomes the main
energy fuel for any “additional” non-steady-rate physical activity.
A) lipid
B) carbohydrate
C) protein
D) Any one of the fuels listed can predominate depending on the diet preceding the
event.
B
Three ways to relate oxygen uptake to aspects of body size and body composition are:
A) mL · kg-1 · min-1; mL · kgDb-1 · min-1; mL · cm MCSA-2 · min-1
B) mL · kg-1 · min-1; mL · kgHeight-1 · min-1; mL · cm NSCA-2 · min-1
C) mL · kg-1 · min-1; mL · kgFFM-1 · min-1; mL · cm MCSA-2 · min-1
D) mL · kg-1 · min-1; mL · kgHeight-1 · min-1; mL · cm SF-2 · min-1
E) None of the answer choices are correct
C
Using the image below, the “best” method to compute the VO2max during the Grade 5-6
measurement period is:
A) average of the 7 yellow data points
B) lowest of the 7 yellow data points
C) average of the first 2 of the 7 yellow data points
D) average of the last 2 of the 7 yellow data points
E) highest of the 7 yellow data points
A
man who weighs 75 kg and jogs at a steady rate of 17 mL· kg-1 · min-1 as shown in
the figure below would expend _____ calories during each minute of the jog.
A) 6.4 kcal · min-1
B) 12.8 kcal · min-1
C) 19.2 kcal · min-1
D) None of the answer choices are correct
A
True or false? OBLA occurs at a higher percent of an untrained person’s VO2max than for
an endurance-trained person.
A) True
B) False
FALSE
True or false? The hormone insulin exerts a profound thermogenic effect on recovery
oxygen uptake.
A) True
B) False
FALSE
rue or false? Lactate threshold occurs at a somewhat lower exercise intensity than the
point of OBLA.
A) True
B) False
TRUE
rue or false? The recovery oxygen uptake can reach about 7 liters without any
appreciable accumulation in blood lactate.
A) True
B) Fals
FALSE
rue or false? An oxygen deficit emerges during aerobic physical activity because the
steady rate is not achieved instantaneously.
A) True
B) False
TRUE
rue or false? The VO2max indicates an individual’s capacity to aerobically resynthesize
glycogen.
A) True
B) False
FALSE
rue or false? The recruitment of slow-twitch muscle fibers favors lactate formation.
A) True
B) False
FALSE
