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WorksheetsMuscle Contraction - Sliding Filament Theory
Total questions: 15
Worksheet time: 8mins
Actin is the ...
Thick Filament within a Muscle Fibre
Thin Filament within a Muscle Fibre
Protein that covers myosin-binding sites
Molecule that causes muscle contraction
Myosin is the ...
Thin Filament of a muscle fibre
Segment of a muscle fibre
A molecule that changes shape when bound with Calcium Ions
Thick Filament of a muscle fibre
The Z Line provides attachment for the ...
Troponin
Myosin
Actin
ATP
Myofibril is an arrangement of ___________ within a muscle fibre.
Bands
Sacromeres
Proteins
Crossbridges
True or False: Cross-bridges is when a myosin head attaches to an actin during contraction
True
False
What starts a muscle contraction?
Release of Calcium Ions
Attachment of Myosin-Heads
An Action Potential
Release of ADP
_________ carries the impulse deep into the myofibrils.
T-Tubules
Synapses
Sarcoplasm
Neurotransmitters
True or False: Calcium Ions bind to Tropomyosin to change the shape of Troponin.
True
False
What does the Myosin Heads release to relax and pull the Actin filament?
ATP
ADP
CNS
ETC
What binds to the Myosin Head to cause it to detach from the Actin?
ATP
ADP
CNS
ETC
True or False: Myosin-Heads act as a ATPase.
True
False
What causes the muscle to stop contracting?
Lack of effort
Myosin-Heads fail to attach
Calcium Ions are pumped away
Muscle fibre tears
Higher Questioning: What happens to the H zone and I Band during contraction?
They grow in size
They stay the same
They shrink in size
Higher Questioning: Whats happens to the A band during contraction?
It grows in size
It stays the same
It shrinks in size
Higher Questioning: Do the lengths of the thick and thin filaments change during contraction?
Yes
No
