Athletes who, due to genetics, possess more Type II muscle fibers than Type I muscle fibers will have
an inherent advantage over another athlete who possesses more Type I than Type II muscle fibers in
activities where which of the following energy systems is dominant?
ATP-PCr
Electron transport chain
Krebs cycle - Answers ATP-PCr
A sport scientist should be familiar with several types of technological tools that may be used to
gather relevant information about athletes in a sports organization. Which tool would be used to
measure the velocity of a barbell during the execution of a back squat exercise?
GPS
Force platform
AMS
IMU - Answers IMU
Which of the following is a primary muscle involved in the 4-way neck exercises?
sternocleidomastoid
tensor fascia late
serratus anterior - Answers sternocleidomastoid
Glycolysis is a 10 step process that results in either 2 or 3 net ATP. In order to have glucose for
glycolysis to occur, glucose is received in the cytoplasm from either the blood or muscle cells
(intramuscular glycogen). Which source of glucose results in 3 net ATP produced?
Blood
Neither can produce 3 net ATP
Muscle Cells (intramuscular glycogen)
Both can produce 3 net ATP, it depends on the amount of time it takes - Answers Muscle Cells
(intramuscular glycogen)
Which member of a sports organization's High Performance Unit is responsible for establishing the
technical and tactical vision forming the basis of how the athletes will play the game?
sport psychologist
sport coach
athletic trainer
strength and conditioning professional - Answers sport coach
A friend of yours, who is on the track team, knows you are taking APK6176 so has asked for advice on
the best way to maximize the appropriate fuel utilization system in order to increase performance on
their 400m run, which is currently at 75 seconds. What advice will you give?
Convert to a high fat/low carb diet which has been shown to improve performance in short duration
events
It doesn't matter, results on training are essentially equivocal with regards to the impact of training
for this type of event
Utilize a work:rest ratio of between 1:5 and 1:10 to maximize glycogen stores - Answers Utilize a
work:rest ratio of between 1:5 and 1:10 to maximize glycogen stores
What is one of the "products", i.e. one of the molecules formed during the Krebs cycle?
NADH
Acetyl-CoA
Glucose - Answers NADH
In order for the interdisciplinary team of a High Performance Unit to get the right information to the
right people at the right time so they can make better decisions, what considerations should be
made?
people, process, place
time, competence, interest
whether to use force plate, IMU, or GPS - Answers people, process, place
What is the cause of the decrease in pH during high intensity exercise?
The H+ that is a product of ATP hydrolysis
The Action potential that depolarizes the sarcolemma
The production of lactate - Answers The H+ that is a product of ATP hydrolysis
, The amount of energy (as measured in kcal) obtained per liter of oxygen consumed when
carbohydrates are the only source of fuel is different than when fatty acids are the only source of fuel.
Which substrate yields the highest kcal per liter of O2 consumed?
fatty acid
carbohydrate - Answers carbohydrate
In which muscle fiber type is the ATP-PCr energy system more prevalent?
Type I (slow twitch)
Type II (fast twitch)
ATP-PCr system is equally prevalent in both muscle fiber types - Answers Type II (fast twitch)
Which of the following energy systems yields the most ATP when carbohydrate is used as the
substrate?
ATP-PCr system
glycolysis
aerobic metabolism - Answers aerobic metabolism
The onset of blood lactate accumulation is said to occur when blood lactate concentrations reach
which of the following?
4mM
8mM
2mM - Answers 4mM
Which myofilament attaches to the Z-line of a sarcomere via the spring-like titin molecule?
actin
myosin
troponin
tropomyosin - Answers myosin
A successful endurance athlete would likely have ________________ compared to a sedentary person
a higher percentage of fast-twitch fibers
a higher percentage of type I fibers
the same percentage of slow-twitch and fast-twitch fibers - Answers a higher percentage of type I
fibers
Which of the following is the most appropriate approach to use when prescribing a vertical jump
exercise?
cue the athlete to focus on their gluteus maximus contracting during the jump portion of the drill
place the vertec veins at a height you know the athlete will not be able to reach
cue the athlete to jump and touch a vein on the Vertec at a pre-determined height - Answers cue the
athlete to jump and touch a vein on the Vertec at a pre-determined height
Which of the following represents a mechanism for increasing the force output from a muscle via the
nervous system?
constrict the diameter of the alpha motor neuron within a motor unit
iincrease the recruitment of motor units
decrease the rate coding of individual motor units - Answers iincrease the recruitment of motor units
Collagen filaments, titin, and tendons make up what portion of the passive length-tension relationship
of a muscle?
series elastic component
parallel elastic component
hyper elastic component - Answers series elastic component
What is the neurotransmitter involved in the excitation-contraction coupling process?
serotonin
acetylcholine
dopamine - Answers acetylcholine
Elite athletes would be expected to demonstrate longer electromechanical delays during similar
exercise challenges when compared to novice athletes.
True
False - Answers false
Which of the following areas of a sarcomere will remain constant in size during a concentric skeletal
muscle contraction?
M-line
A-band