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22 terms

exercise physiology quiz 1

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the factor which limits ATP synthesis in the ATP-PCr metabolic pathway is:
depletion of phosphocreatine
where does ATP syntheis occur in the anaerobic glycolytic pathway
sarcoplasm
what is the difference between glucose and glycogen
glycogen is a stored form of glucose
which of the following best represents the order in which you would use each metabolic energy system for the purpose of running a marathon:
ATP - PCr -anaerobic glycolytic - oxidative
when a muscle is not contracting, active binding sites on an actin filament are covered by a thin, thread-like protein called:
tropomyosin
edward hitchcock jr:
kept detailed statistical records of exercising Amherst college undergrads
how many ATP are generated for every two H+ ions that enter the electron transport chain?
3
the harvard fatigue laboratory:
legitimized exercise physiology as its own area of study
the fields of exercise and sport physiology:
study how body's structures and functions are altered by exercise, apply physiological principles to an individual's training and performance, require an understanding of normal muscular and cardiovascular function
lactate is the byproduct of which metabolic energy system
anaerobic glycolytic
which of the following statements regarding VO2max is incorrect?
is determined by completing the wingate test
how long does it take for the body to remove lactate from muscle tissue following maximal intensity exercise?
20-40 min
the fast component of the process of oxygen recovery following exercise represents the time needed by the body to:
synthesize and restore muscle stores of ATP and PCr
type II muscle fibers use __ as fuel for muscular contraction and are most often used for ___
glycogen; high-intensity, short-duration events
what is a fasicle
bundle of muscle fibers
calcium when released into skeletal muscle tissue, causes which of the following to occur at the level of the sarcomere (question 16)?
two of the above: active binding sites for cross bridge formation are revealed and actin strands are pulled toward each other
the depletion of glycogen limits the production of ATP in which metabolic pathway
anaerobic glycolytic and oxidative
the term "anaerobic glycolysis is best defined as:
the catabolic metabolism of glycogen in the absence of oxygen
a motor unit:
consists of an alpha motor neuron and all the muscle fibers it innervates and is comprised of homogenous muscle fibers
the functional unit of skeletal muscle is called
a sarcomere
during aerobic glycolysis:
NADH and FADH2 deliver electrons to the electron transport chain
which of the following happens as a result of ATP binding to a myosin head?
separation of myosin from actin