2023-12-06T17:51:52+03:00[Europe/Moscow] en true <p>1. An ____________ travels down the _____ to the ___________</p>, <p>Previous Step: An action potential travels down the axon to the axon terminal</p><p></p><p>(2) _______________________ in the axon terminal open and ________ enters</p>, <p>Previous Step: Voltage gated calcium channels in the axon terminal open and calcium enters</p><p></p><p><strong>(3) ______________ release ________________ via ___________ into the ___________</strong></p>, <p>Previous Step: synaptic vesicles release acetylcholine (Ach) via exocytosis into the synaptic cleft</p><p></p><p><strong>(4) Ach binds to ___________________ on the ____________</strong></p>, <p>Previous Step: Ach binds to it's receptor (a chemically gated ion channel) on the motor end plate</p><p></p><p><strong>(5) The _____________ opens</strong></p>, <p>Previous Step: The ion channel opens</p><p></p><p><strong>(6) ________ enters and __________ exits through the ___________, but _______ enters to a greater extent than ________ exits</strong></p>, <p>Previous Step: Sodium enters and potassium exits through the ion channel, but sodium enters to a greater extent than potassium exits</p><p></p><p><strong>(7) _____________ occurs as the membrane potential becomes _____________</strong></p>, <p>Previous Step: Depolarization occurs as the membrane potential becomes less negative </p><p></p><p><strong>(8) This triggers an ____________ which is ____________ along the ___________ via the opening of ___________________</strong></p>, <p>Previous Step: This triggers an action potential which is propagated along the sarcolemma via the opening of voltage gated sodium channels</p><p></p><p><strong>(9) The sarcolemma is __________ as _____________________ close and ____________________open allowing _________to exit the cell</strong></p>, <p>Previous Step: The sarcolemma is repolarized as voltage gated sodium channels close and voltage gates potassium channels open allowing potassium to exit the cell</p><p></p><p><strong>(10) The action potential is propagated down the ________ of the ____</strong></p>, <p>Previous Step: The action potential is propagated down the T-tubules of the triads</p><p></p><p>(<strong>11) The action potential causes voltage-sensitive tubule proteins to change shape and opens ___________ in the ___________ of the _______________________</strong></p>, <p>Previous Step: The action potential causes voltage-sensitive tubule proteins to change shape and opens calcium channels in the terminal cisterns of the sarcoplasmic reticulum</p><p></p><p><strong>(12) ________ enters the _______ and binds to ________ thereby removing the blocking action of ___________</strong></p>, <p>Previous Step: Calcium enters the sarcoplasm and binds to troponin thereby removing the blocking action of tropomyosin</p><p></p><p><strong>(13) This exposes binding sites for ______ on the _____________</strong></p>, <p>Previous Step: This exposes binding sites for myosin on the actin filament</p><p></p><p><strong>(14) _______ binds to _____ forming a ________ and _________ begins</strong></p>, <p>Previous Step: Myosin binds actin forming a cross bridge and contraction begins</p><p></p><p><strong>(15) A __________ occurs as myosin pivots and bends at the hinge region resulting in myosin pulling on actin</strong></p>, <p>Previous Step: A power stroke occurs as myosin pivots and bends at the hinge region resulting in myosin pulling on actin</p><p></p><p><strong>(16) In the presence of ____, myosin detaches from actin</strong></p>, <p>Previous Step: In the presence of ATP, myosin detaches from actin</p><p><strong>(17) The _________ return to the "cocked position"</strong></p> flashcards
steps for skeletal muscle contraction

steps for skeletal muscle contraction

Customize
collection saved
Share
Long Term Learning Spaced Repetition
Add to Long Term Learning Desk
Fast learning Repeat this set of flashcards
Preview Test Spell
Play
Match
Review

  • 1. An ____________ travels down the _____ to the ___________

    action potential

    axon

    axon terminal

  • Previous Step: An action potential travels down the axon to the axon terminal

    (2) _______________________ in the axon terminal open and ________ enters

    Voltage-gated calcium channels

    calcium

  • Previous Step: Voltage gated calcium channels in the axon terminal open and calcium enters

    (3) ______________ release ________________ via ___________ into the ___________

    synaptic vesicles

    acetylcholine

    exocytosis

    synaptic cleft

  • Previous Step: synaptic vesicles release acetylcholine (Ach) via exocytosis into the synaptic cleft

    (4) Ach binds to ___________________ on the ____________

    a chemically gated ion channel

    motor end plate

  • Previous Step: Ach binds to it's receptor (a chemically gated ion channel) on the motor end plate

    (5) The _____________ opens

    ion channel

  • Previous Step: The ion channel opens

    (6) ________ enters and __________ exits through the ___________, but _______ enters to a greater extent than ________ exits

    Sodium

    potassium

    ion channel

    sodium

    potassium

  • Previous Step: Sodium enters and potassium exits through the ion channel, but sodium enters to a greater extent than potassium exits

    (7) _____________ occurs as the membrane potential becomes _____________

    Depolarization

    less negative

  • Previous Step: Depolarization occurs as the membrane potential becomes less negative

    (8) This triggers an ____________ which is ____________ along the ___________ via the opening of ___________________

    action potential

    propagated

    sarcolemma

    voltage gated sodium channels

  • Previous Step: This triggers an action potential which is propagated along the sarcolemma via the opening of voltage gated sodium channels

    (9) The sarcolemma is __________ as _____________________ close and ____________________open allowing _________to exit the cell

    repolarized

    voltage-gated sodium channels

    voltage-gated potassium channels

    potassium

  • Previous Step: The sarcolemma is repolarized as voltage gated sodium channels close and voltage gates potassium channels open allowing potassium to exit the cell

    (10) The action potential is propagated down the ________ of the ____

    T-tubules

    triads

  • Previous Step: The action potential is propagated down the T-tubules of the triads

    (11) The action potential causes voltage-sensitive tubule proteins to change shape and opens ___________ in the ___________ of the _______________________

    calcium channels

    terminal cisterns

    sarcoplasmic reticulum

  • Previous Step: The action potential causes voltage-sensitive tubule proteins to change shape and opens calcium channels in the terminal cisterns of the sarcoplasmic reticulum

    (12) ________ enters the _______ and binds to ________ thereby removing the blocking action of ___________

    Calcium

    sarcoplasm

    troponin

    tropomyosin

  • Previous Step: Calcium enters the sarcoplasm and binds to troponin thereby removing the blocking action of tropomyosin

    (13) This exposes binding sites for ______ on the _____________

    myosin

    actin filaments

  • Previous Step: This exposes binding sites for myosin on the actin filament

    (14) _______ binds to _____ forming a ________ and _________ begins

    Myosin

    actin

    cross bridge

    contraction

  • Previous Step: Myosin binds actin forming a cross bridge and contraction begins

    (15) A __________ occurs as myosin pivots and bends at the hinge region resulting in myosin pulling on actin

    power stroke

  • Previous Step: A power stroke occurs as myosin pivots and bends at the hinge region resulting in myosin pulling on actin

    (16) In the presence of ____, myosin detaches from actin

    ATP

  • Previous Step: In the presence of ATP, myosin detaches from actin

    (17) The _________ return to the "cocked position"

    myosin heads