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lecture exam 4

QuestionAnswer
myofibrils occupy 80% of the muscle volume and made up of thick and thin myofilaments
calcium ions essential to muscle contraction
polarity of a resting cell -95 mv
triad formed by two terminal cisternae and a central T- tubule
sarcoplasmic reticulum calcium pumps move calcium into the spr where it is stored and release calcium through open voltage gate calcium channels .
thick filament made of 200 to 500 myosin (protein) molecules
depolarization occurs when NA+ enters the muscle fiber and
repolarization occurs when K+ leaves the fiber
filaments are organzied thick filament surrounded by 6 thin filaments
the number of skeletal muscle cells innervated by a single motor neuron is known as motor unit
the tension in a skeletal muscle is insufficient to overcome a resistance, and does not cause the muscle fiber contraction isometric muscle contraction
gap junctions are notably absent in which muscle tissue skeletal muscle
what structure is formed by the invaginations of the sarcolemma of smooth muscle caveolae
which muscle tissue has the greatest capacity for regeneration following injury smooth muscle
in the sliding filament theory of the muscle contraction which structure does the sliding actin
which of the following pathways produce the greatest amount of atp mitochondrial oxidative phosphorylation
which physiological event is excitation- contraction coupling 2nd physiological event
what is present in the sarcomere of a relaxed muscle fiber h zone
what structure is formed by the invaginations of the sarcolemma of the skeletal muscle transverse tubules
which energy supply system provides for immediate needs of the skeletal muscle phosphagen system
striations of the skeletal muscle tissue is due to alternating bands of thick and thin myofilament
sequential order from smallest to largest myofilament, myofibrils, myofiber, fascicle , muscle
neurotransmitter released from the somatic motor neurons at the neuromuscular junction acetylcholine
which ion is released from the terminal cisterna flooding the sarcoplasm removing regulatory proteins from myosin binding calcium ions
what is not an component of cardiac tissue varicosities
the end plate potential is generated at motor end plate
the structural and functional unit of the skeletal and cardiac muscle system is the sarcomere
a common feature of all muscle tissue thick and thin filament
Created by: Rhonjoh2979
 

 



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