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15
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What causes rigor mortis?
moving Ca into the sarcoplasmic reticulum requires energy (low to high concentration) so,Ca leaks into the muscles......
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heart
Other team wins 20 points!
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shark
Other team loses 20 points!
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fairy
Take points!
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25
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baam
Lose 20 points!
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25
×
identify a, b, c, d, e in the figure
a: epimysium, b: perimysium, c: endomysium, d: muscle cell(fiber), e: fascicle,
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15
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The sarcoplasmic reticulum uses active transport to put calcium back onto the organelles. Is this the beginning or end of the contraction?
End
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15
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What does it mean when a motor neuron is recruited?
motor neuron is recruited: it is responding to a stimulus by sending action potentials down its axon.
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15
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Two muscle fibers that are right next to each other do not contract at the same time. are they part of the same motor unit?
no
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15
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What does acetylcholinesterase do for the muscle?
Breaks down the neurotransmitter acetylcholine, preventing action potentials from reaching muscle. allowing the muscle to relax
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20
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Explain the difference between subthreshold, threshold, submaximal and maximal stimulus.
Stimuli
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15
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What is the first step of the sliding filament model?
An action potential causes the sarcoplasmic reticulum to release Calcium into the cell
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25
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name and describe the 3 types of muscle tissue, including shape and nucleus.
Skeletal, cardiac and smooth
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15
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What happens between the power stroke and the return stroke?
ATP binds to the myosin heads causing them to release the active sights on the actin. (setting the stage for a sequel)
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15
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Each muscle has its own nerve to make it move and blood vessel because it is a voracious
Energy Hog. needing ATP for myosin to bind to the actin and to put the Ca back into the sarcoplasmic reticulum
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15
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What is a motor unit?
motor unit: One motor neuron and all the muscle fibers it innervates.
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15
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calcium ions are being actively transported into the sarcoplasmic reticulum. Is it the beginning or the ending of a contraction?
ending, it is resetting the calcium. (Active transport requires energy)
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trap
No points!
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fairy
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25
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shark
Other team loses 25 points!
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lifesaver
Give 25 points!
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banana
Go to last place!
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gift
Win 25 points!
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rocket
Go to first place!
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lifesaver
Give 25 points!
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