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the neurotransmitter released at the neuromuscular junction as the result of depolarization of neuron
number of active cross bridges
the factor that is primary determinant of force prodcution in a single skeletal muscle cell
myosin ATPase isoform
the biochemical property of skeletal that is the key factor that regulates contraction velocity (Vmax)
placing the muscle in a starting position in which it is contracted slightly below its resting length
this would not contribute to increased force production in an entire muscle
type II skeletal cells
aging is associated with sarcopenia, and this process is most pronounced in ___
all of the above
which of the following effects does exercise have on myocardial infarction?
-reduces the chance of occurrence
-reduces the number of cardiac cells that die during ischemia
-increases survival rate
neurons of the parasympathetic nervous system release __ at its nerve terminals on the SA node __ heart rate.
removal of parasympathetic input
change in nervous system outflow that is responsible for the initial increase of exercise.
according to the Frank-Starling law of the heart, an increase in end-diastolic volume will __ the force of contraction and thus volume of blood pumped by the heart per beat
the intensity of exercises decreases the amount of vasodilation and blood flow to active muscle.
SV decreases and HR increases
accurately describes how cardiac output is maintained during prolonged sub maximal at a fixed intensity
the lung volume that represents the amount of air inhaled or exhaled in 1 normal breath
lung volume that represents the amount of air that can be forcefully exhaled following a maximal test. (expiratory reserve volume + tidal volume + inspiratory reserve volume)
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