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AnatomyT3Q1

QuestionAnswer
Muscle that has a striped appearance is described as being striated
Which element is important in directly triggering contraction? Calcium (Ca++)
According to the sliding filament model, binding sites on actin open when calcium ion levels rise
During muscle contraction, the cross-bridge detaches when the myosin head binds to an ATP molecule
Thick and thin filaments are organized into functional units called sarcomeres
A sprinter would experience muscle fatigue sooner than a marathon runner due to anaerobic metabolism in the muscles of the sprinter
Active shortening of muscle cell and generation of tension (force) contractility
The electrical potential change is coupled to intracellular changes that result in contraction
Passive stretching of muscle cells extensibility
Return of muscle cells to original resting length after being stretched elasticity
Is the skeletal muscle voluntary or involuntary? voluntary
When muscles contract the insertion moves towards the origin
What is the smallest contractile unit of muscle called? sarcomere
"Power stroke" is related to the ___ model of contraction. sliding filament
Axons of motor neurons branch profusely as they enter muscles. Each axonal branch fors a ___ with a single myocyte. neuromuscular junction
Each motor neuron and all the myocytes it innervates is called a ___ motor unit
Though very close, axon terminals and motor endplates are always separated by a space called the synaptic cleft
What is a transiet plasma membrane electrical depolarization event? action potential
Created by: haileyjordan
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