Muscle Flashcards
skeletal muscle
strong, quick discontinous voluntary contraction, straited, nucleus are off to side
cardiac muscle
strong quick continous, involuntary contraction, striated, multinucleated, nuclei are centered at intercalated disks
smooth muscle
weak,slow involuntary contraction, not triated and nuclei are centered
myoblasts
come to gether and fuse from mesenchymal cells to produce myotube which mature to form muscle fiber
thin filament
made up of G actin and F actin in a double helix
troponin I
inhibitor covers up the actin sites
troponin T
binds actin
troponin C
interacts with calcium to help uncover the actin sites
thick filament
made up of heavy and light chains and myosin headsq
what is the Z disk made up of?
alpha actinin
what is the functional subunit of skeletal muscles
sarcomere
the smooth Er is called what in skeletal muscle
sarcoplasmic reticulum
where does the triad occur in skeletal muscle
AI junction
what is the neurotransmitter for skeletal muscle ?
acetocholine
around each muscle cells is ______________-. If we wrap 10-20 bundles of muscle this wrapping is called_________________________. The bundle is called ______________. The layer that wraps a bunch of fasicles is called ______________-
endomysium, perimysium, fasicle, epimysium
muscle cell + neuron + neuron branches
motor unit
Where is the T tubule (diad) in the cardiac muscle ?
Z disk
What are at the intercalated disks
gap juntions and desmosomes
what is the function of dense bodies in smooth muscle cell >
form achoring points all through the smooth muscle so when it contracts it just scrunches up
Explain the location of the three types of muscle
Cardiac-wall of heart
Skeletal associated with bones
Smooth muscle-walls of hollow organs and blood vessels
Explain the nuclei of the types of muscle
Skeletal many peripheral and flattened
Cardiac 1-2 corn trail pump
Smooth muscle-one central nucleus
Explain the cell diameter of the muscle types
Skeletal largest, cardiac intermediate, smooth muscle smallest
Which muscle types have striations
Skeletal and muscle
Which muscle types have sarcoplasmic reticulum
Skeletal and cardiac
Does smooth muscle have t tubules
NO
Which muscle types are involuntary
Smooth and cardiac
Which muscle type is slow in contraction
Smooth
Capillary supply is highest in what type of muscle
Cardiac
Which type of muscle stains soe basophilic in addition to eosinophilic
Smooth
Which muscle type has the ability to synthesize collagen and elastin
Smooth
