Notes in Didactic Term 1::Phys 1::Exam 1::Muscle Phys

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Status	Last Update	Fields
Published	01/29/2025	Contractile muscle proteins are {{c1::myosin}} and {{c1::actin}}
Published	01/29/2025	Regulatory muscle proteins are {{c1::troponin}} and {{c1::tropomyosin}}
Published	01/29/2025	Structural muscle proteins are {{c1::titin}} and {{c1::dystrophin}}
Published	01/29/2025	what protein connects myofibril to the sarcolemma?
Published	01/29/2025	what binds to oxygen in muscle cells?
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Published	01/29/2025	Describe the sliding filament mechanism
Published	01/29/2025	Muscle fibers contain {{c1::glycogen}} and {{c1::myoglobin}}
Published	01/29/2025	{{c1::Myofibrils}} are the contractile unit of the muscle cell
Published	01/29/2025	At rest, binding sites on actin are blocked by the {{c1::troponin complex}}.
Published	01/29/2025	Dystrophin helps to {{c1::transmit contractile force to connective tissue of ECM, allowing the generation of movement}}
Published	01/29/2025	Calcium is stored in the {{c1::sarcoplasmic reticulum}}
Published	01/29/2025	More myofibrils a muscle cell has, {{c1::the stronger the muscle and greater the contractile force}}
Published	01/29/2025	During muscle contraction, the area of the H-band {{c1::decreases}}
Published	01/29/2025	During contraction, the Z-dics {{c1::come closer together}}
Published	01/29/2025	During muscle contraction, the A-band {{c1::remains the same size }}
Published	01/29/2025	{{c1::ATP}} is required to release myosin head from actin.
Published	01/29/2025	Rigor mortis occurs because {{c1::no ATP to release myosin heads from actin. }}
Published	01/29/2025	ACh released from presynaptic neuron binds to {{c1::Nicotinic Ach receptor on skeletal muscle }}
Published	01/29/2025	Resting membrane potential of skeletal muscle cell is {{c1::-90mV}}
Published	01/29/2025	During excitation-contracting coupling, calcium is released from the {{c1::terminal cistern}} of the sarcopplasmic reticulum
Published	01/29/2025	What is calcium bound to in SR and why is it important?
Published	01/29/2025	what does the force of muscle contraction depend on?
Published	01/29/2025	The optimal length muscle contraction is the area in which...
Published	01/29/2025	What is the relationship between muscle contraction and motor units?
Published	01/29/2025	What is the benfit of innervation of a muscle with a single motor unit?
Published	01/29/2025	What is the benfit of innervation of a muscle with a multiple motor units?
Published	01/29/2025	During motor unit recruitment, {{c1::weak motor units}} are recruited first.
Published	01/29/2025	Motor units contract {{c1::alternatively}}.How does this affect muscle contraction?
Published	01/29/2025	Weak, involuntary contraction of motor units creates {{c1::muscle tone (tonus) }}
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Published	01/29/2025	Unfused tetnus:
Published	01/29/2025	Fused tetnus:
Published	01/29/2025	Wave summation
Published	01/29/2025	What is the result of wave summation?
Published	01/29/2025	Sources of calcium in...1. Skeletal muscle: ? 2. Cardiac muscle: ?3. Smooth muscle: ?
Published	01/29/2025	Increased intraceullar Calcium concentration inititates {{c1::contraction}} and {{c1::increases}} muscle tension.
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Published	01/29/2025	What is responsible for sequesteringn calcium released from the SR?
Published	01/29/2025	What is sequestered calcium stored as?Why is sequestered calcium stored this way?
Published	01/29/2025	What determines the rate of muscle relaxation?
Published	01/29/2025	What enhances calcium ATPase activity in cardiac muscle cells?
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