When a sedentary individual begins a weight training program, what are the initial strength gains mainly a result of?
Neural adaptations
What laboratory founded in the United States in 1927 has been the most influential in terms of having an impact on the field of exercise physiology?
Harvar...
when a sedentary individual begins a weight training program
what are the initial strength gains mainly a result of
what laboratory founded in the un
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KINE 3805
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KINE 3805 Final Exam
When a sedentary individual begins a weight training program, what are the initial
strength gains mainly a result of? - Answer Neural adaptations
What laboratory founded in the United States in 1927 has been the most influential in
terms of having an impact on the field of exercise physiology? - Answer Harvard Fatigue
Laboratory
What is the functional unit of a muscle fiber? - Answer Sarcomere
What is the function of the T-tubules? - Answer Carry the action potential deep
(transversely) into the muscle cell
The _____ motor neuron innervates skeletal muscle fibers and stimulates muscle
contraction - Answer Alpha-motor neuron
What protein blocks the myosin binding site on actin at rest in skeletal muscle? -
Answer Tropomyosin
Which muscle fiber type is most fatigue resistant? - Answer Type 1
What type of muscle contraction is characterized by muscle shortening? - Answer
Concentric
What metabolic pathway predominates in producing ATP during a 100 meter (~10
second in duration) sprint? - Answer PCr
What metabolic pathway is primarily responsible for producing ATP during a half mile
run (~2-3 minutes of exercise)? - Answer Glycolysis (Anaerobic)
What metabolic pathway is responsible for producing ATP during a marathon (26.2
miles, ~4 hours)? - Answer Oxidative phosphorylation (Aerobic)
What enzyme catalyzes the reaction that transfers a phosphate from phosphocreatine
to ADP, thereby form ATP and creatine? - Answer Creatine kinase
What is pyruvate converted to under conditions of low oxygen (anaerobic)? - Answer
Lactic Acid
What is the one molecule that all substrates are converted to before they enter the
Krebs Cycle? - Answer Acetyl-CoA
Which structure is responsible for the salatory conduction (speeding up of an action
potential) characteristic of a neuron? - Answer Myelin sheath
What part of a neuron is responsible for releasing neurotransmitters? - Answer Axon
terminal
, KINE 3805 Final Exam
Type 1 fibers reach peak force faster than Type 2 fibers (i.e. type 1 are more powerful
than type 2). - Answer False
Which enzymes hydrolyzes (breaks down) ATP to enable contraction? - Answer Myosin
ATPase
Muscle relaxation does not require ATP - Answer False
Which enzymes uses ATP to pump calcium from sarcoplasm back into the sarcoplasmic
reticulum? - Answer SERCA
Which of these substrate stores can provide the most overall ATP production? - Answer
Triglycerides
The basic structural unit of the nervous system is the - Answer Neuron
An athlete with a high percentage of Type II fibers would exhibit which characteristics? -
Answer fewer mitochondria, lower oxidative enzymes
For aerobic metabolism, free fatty acids must be converted to acetyl-CoA via - Answer
Beta-oxidation
What is the primary cause of membrane depolarization during an action potential? -
Answer Na+ flowing into the cell
Neurons that carry information from the peripheral tissues to the central nervous system
are known as - Answer Afferent neurons
In which organelle does oxidative phosphorylation occur? - Answer Mitochondria
Adipose tissue functions as a storage depot for what energy substrate? - Answer fats
Rank the muscle fiber types in order from most powerful to least powerful - Answer
Type IIx, Type IIa, Type I
_____ binds calcium after it is released from the SR, which causes _____ to move and
open the myosin binding sites on actin - Answer Troponin; Tropomyosin
Skeletal muscle cells are similar to other cell types in that they are multinucleated. -
Answer True
Glycogen is stored in the - Answer Sarcoplasm
Binding of _____ to _____ creates a cross-bridge and it is required for muscle
contraction - Answer Myosin; Actin
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