Sliding Filament Theory
Complete the chart of participants of the sliding filament theory:
Number the statements in the proper sequence to describe excitation-contraction coupling. Step 1 has been numbered for you.
___1____ 1. Acetylcholine is released by the axon terminal, diffuses to the muscle cell and attaches To ACh receptors on the sarcolemma.
________ 2. The action potential, carried into the cell via the T-tubules, causes the SR to release Calcium ions.
________ 3. Ach-E breaks down Ach, which separates from its receptors.
________ 4. The muscle cell relaxes and lengthens.
________ 5. The calcium ion concentration at the myofilaments increases; the myofilaments slide Past one another and the cell shortens.
________ 6. …show more content…
Within 30 ms after the AP ends, Ca2+ concentration at the myofilaments decreases.
Number the events in correct order for the cross-bridge formation and cycle. The first step is indicated with (number 1).
________ 1. Myosin heads bind to active sites on actin molecules
________ 2. ATP is hydrolyzed.
________ 3. Myosin heads return to their cocked position ready for the next working stroke.
___1____ 4. Calcium ions bind to troponin.
________ 5. Cycling continues until calcium ions return to the SR.
________ 6. Myosin cross bridges detach from actin.
________ 7. Troponin changes shape.
________ 8. ADP and inorganic phosphate are released from the thick filament.
________ 9. Myosin heads pull on the thin filaments, sliding them toward the center of the sarcomere.
________ 10. ATP binds to the thick …show more content…
The # of motor units determines the amount of strength brought to a particular action.
____________________________________________: energy source for muscle contraction
____________________________________________: the less moveable point of attachment
____________________________________________: the more moveable point of attachment
_____________________________________________: agonist; moves the body away from anatomical position
_____________________________________________: reverses motion of agonist; approximates anatomical position
MUSCLES OF MASTICATION:
MUSCLES OF FACIAL
Number the statements in the proper sequence to describe excitation-contraction coupling. Step 1 has been numbered for you.
___1____ 1. Acetylcholine is released by the axon terminal, diffuses to the muscle cell and attaches To ACh receptors on the sarcolemma.
________ 2. The action potential, carried into the cell via the T-tubules, causes the SR to release Calcium ions.
________ 3. Ach-E breaks down Ach, which separates from its receptors.
________ 4. The muscle cell relaxes and lengthens.
________ 5. The calcium ion concentration at the myofilaments increases; the myofilaments slide Past one another and the cell shortens.
________ 6. …show more content…
Within 30 ms after the AP ends, Ca2+ concentration at the myofilaments decreases.
Number the events in correct order for the cross-bridge formation and cycle. The first step is indicated with (number 1).
________ 1. Myosin heads bind to active sites on actin molecules
________ 2. ATP is hydrolyzed.
________ 3. Myosin heads return to their cocked position ready for the next working stroke.
___1____ 4. Calcium ions bind to troponin.
________ 5. Cycling continues until calcium ions return to the SR.
________ 6. Myosin cross bridges detach from actin.
________ 7. Troponin changes shape.
________ 8. ADP and inorganic phosphate are released from the thick filament.
________ 9. Myosin heads pull on the thin filaments, sliding them toward the center of the sarcomere.
________ 10. ATP binds to the thick …show more content…
The # of motor units determines the amount of strength brought to a particular action.
____________________________________________: energy source for muscle contraction
____________________________________________: the less moveable point of attachment
____________________________________________: the more moveable point of attachment
_____________________________________________: agonist; moves the body away from anatomical position
_____________________________________________: reverses motion of agonist; approximates anatomical position
MUSCLES OF MASTICATION:
MUSCLES OF FACIAL