Physiology of Exercise SFA test 1 quiz questions Flashcards Quizlet PDF

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7/5/2021

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

Physiology of Exercise SFA test 1 quiz questions Terms in this set (62) what is the neurotransmitter

acetylcholine

released by the alpha-motor neuron?

what is required for myosin to

ATP

detach from actin to allow the cross bridge cycle to continue?

the protein prevents the

tropomyosin

contractile proteins from cross bridging at rest

the primary role of the

store/release calcium

sacroplasmic reticulum

what contractile protein makes

myosin

up the thick filament of the sacromere?

an individual muscle cell is

muscle fiber

known as

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1/10

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which of the following is not an

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

conversion of FFAs to Triglycerides

effect of epinephrine/norepinephrine release from the adrenal glands

which of the following

cortisol

hormones puts the body in a fuel storage mode?

higher RER values indicate

carbohydrate

what fuel source is being utilized?

the determination of energy

direct calorimetry

expenditure by measuring heat production is known as

O2 consumption (VO2)

true

increases in a linear, exercise intensity-dependent fashion

____ occurs post exercise when

EPOC

O2 consumption remains elevated beyond O2 demand

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2/10

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which method of measuring

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

indirect calorimetry

energy expenditure is most common in exercise physiology?

which of the following is not a

replenish CO2 stores

protein cause of EPOC?

approximately how many

5 kcal/L

calories are expended per liter of O2 consumed?

______ occurs at the onset of

O2 deficit

exercise or with an initial increase in exercise intensity when oxygen demand is greater than the current oxygen consumption

the respiratory exchange ratio

CO2 produced/ O2 consumed

=

RER decreases as the intensity

false

of exercise increases

the energy system

glycolysis

predominates for 1-3 minutes of intense exercise

which of these is not a step in

beta oxidation

the oxidation of carbohydrate?

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3/10

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what is the rate limiting enzyme

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

phosphofructokinase

in glycolysis?

what is the net yield of ATP

2 ATP

from the breakdown of glucose to pyruvate through glycolysis alone?

The high energy electron

H+

carrier molecule (NADH,FADH2) contribute to the buildup of what ion in the intermembrane space of the mitochondria?

lactate is a dead-end

false

metabolic byproduct that contributes to fatigue and delayed onset muscle soreness

the enzyme involved in the

creatine kinase

ATP-PCr reaction

the location of glycolysis in the

cyotosol

cell

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what are the high energy

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

NADH & FADH2

electron carrier molecules produced in glycolysis, beta oxidation, and the krebs cycle that ultimately lead to large ATP yields in the electron transport chain?

____ is consumed/utilized in the

O2, CO2

electron transport chain during aerobic exercise, and ____ is produced in the krebs cycle as a byproduct of oxidative metabolism

the final electron acceptor in

O2

the electron transport chain is...

if pyruvate does not enter the

true

mitochondria, it is converted to lactate. this happens especially at higher intensities of exercise when glycolysis is occurring at a fast rate.

lactate is the direct cause of

false

fatigue during high intensity exercise

which macronutrient fuels

carbohydrate

oxidative metabolism at higher intensities of exercise?

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the process of breaking up a

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beta oxidation

long free fatty acid chain into 2-carbon acetyl CoA units to go through the krebs cycle is called...

this energy system provides a

ATP-PCr

rapid supply of ATP for the initial 10 seconds of exercise

muscle spindles are sensitive to

stretch; contraction

____ and initiate reflex ____ of the muscle

the rapid depolarization of a

action potential

membrane is known as a(n)...

which branch of the autonomic

sympathetic

nervous system is predominant during exercise?

golgi tendons are sensitive to

tension; inhibition

_____ and initiate reflex ____ of the muscle

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what is released from the

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

neurotransmitters

synaptic vesicles at the axon terminals of a neuron to communicate to the next cell?

the cell has a positive resting

false

membrane potential

the rapid depolarization of the

Na+

cell during an action potential is due to the influx (enetering) of what ion into the cell?

the resting membrane

sodium potassium pump

potential is created by

the depletion of what energy

glycogen

source would most likely be the cause of fatigue for a marathon runner?

which of the following could

muscle spindle stimulation & golgi tendon inhibition

be the cause of exercise associated muscle cramps due to neuromuscular disturbances?

what is the main factor that

eccentric muscle contraction

initially causes DOMS?

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what are the two primary

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

accumulation of H+ & edema

causes of acute muscle soreness?

the structural damage to

true

muscle through training, inflammatory response, and subsequent repair and growth is a part of the normal training response

which of the following

H+

metabolic by-products makes the muscle acidic and interferes with the enzymes involved in glycolysis and ATP synthesis

the depletion of which energy

phophocreatine

source would most likely be the cause of fatigue for a sprint athlete?

the presence of this protein or

myoglobin?

enzyme in the blood in an indication that the muscle/muscle membrane has been damaged

what is the regulatory

mTOR

protein/enzyme known to turn muscle protein synthesis on when it is activated?

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which of the following would

Physiology of Exercise SFA test 1 quiz questions Flashcards | Quizlet

increased autogenic inhibition

not be an advantageous nervous system adaptation for strength gains?

which is more likely cause for

fiber hypertrophy

the increase in muscle size observed following strength training?

fiber hypertrophy leads to

true

increased force generation capacity of the muscle by increasing myofibril protein content

relative gains in strength are

true

similar between men and women following strength training

initial gains in strength in a

neural changes

resistance training program are due to...

which of the following would

they have a greater sarcoplamsic reticulum

not be true about Type I

development than Type II fibers

fibers?

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ATP is required for which two

the release/detachment of myosin head from actin

of the following processes

& the pumping of calcium back in to sacroplasmic

involved with muscle

reticulum

contraction/relaxtion?

mitochondria are essential for

oxidative metabolism

which of the following energy systems?

based on the following

actin and myosin would completely overlap at point

graphic, which statement

#5

below is most accurate?

which of the following health

improved body composition through increased lean

benefits of exercise are more

mass

likely to be attained from resistance exercise rather than endurance exercise?

for the most part, as exercise

increases proportionally

intensity increases, VO2

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