muscles and motility Flashcards
Outline the order of the sliding filament model
skeletal muscle > fasicle > muscle fiber > myofibril > myofibers (sarcomere)
what is skeletal muscle?
muscle that is connected to bone and voluntarily moved
what is the sarcolemma?
the cell membrane of a muscle
what happens after the neuron sends an action potential down the axon terminal?
the vesicles release neurotransmitters to bind with recepters located on the post-synaptic side
what happens after the vesicles release neurotransmitters to bind with recepters located on the post-synaptic side
sodium rushes into the post-synaptic cell through synaptic transmittion
what happens after sodium rushes into the post-synaptic cell through synaptic transmittion
the muscle cell of the muscle fiber depolarizes due to increased sodium and allows for even more sodium to pass through
what happens after the muscle cell of the muscle fiber depolarizes due to increased sodium and allows for even more sodium to pass through
the action potential now travels down the sarcolema and down the t-tubule to reach the sarcoplasmic reticulum
what happens after the action potential now travels down the sarcolema and down the t-tubule to reach the sarcoplasmic reticulum
calcium from the sarcoplasmic reticulum binds with troponin causing the tropomyosin to peel away from the binding sites of the actin
what happens after calcium from the sarcoplasmic reticulum binds with troponin causing the tropomyosin to peel away from the binding sites of the actin
the myosin heads will bind with the actin forming a cross bridge
what happens after the myosin heads bind with the actin forming a cross bridge
the myosin will pull (power stroke) the actin causing it to shorten for the muscle to contract
what happens after the myosin will pull (power stroke) the actin causing it to shorten for the muscle to contract
ATP breaks the cross bridge and the myosin heads reset
