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Questions and Answers
What is the primary role of tendons in skeletal muscle movement?
What is the primary role of tendons in skeletal muscle movement?
- To act antagonistically to other muscles
- To exert force from the muscle onto the bone, causing movement (correct)
- To change the shape of the muscle during contraction
- To provide energy for muscle contraction
Why do skeletal muscles work in antagonistic pairs?
Why do skeletal muscles work in antagonistic pairs?
- To stretch the partner muscle, using less energy
- To ensure one muscle can relax at any given time
- Because muscles can only contract in one direction (correct)
- To allow muscles to both push and pull limbs
What is the 'Sliding Filament Mechanism' primarily referring to?
What is the 'Sliding Filament Mechanism' primarily referring to?
- The movement of actin and myosin filaments during muscle contraction. (correct)
- The arrangement of skeletal muscles in antagonistic pairs that pull in opposite directions
- The process of bones sliding past each other at joints
- The mechanism that exerts a force via tendons
In a relaxed muscle, what happens to the muscle's antagonistic pair?
In a relaxed muscle, what happens to the muscle's antagonistic pair?
What property of bone is most important for facilitating skeletal movement via muscular force?
What property of bone is most important for facilitating skeletal movement via muscular force?
Which event immediately precedes the return of a stretched 'partner' muscle to its original state?
Which event immediately precedes the return of a stretched 'partner' muscle to its original state?
If a muscle is unable to push, how is movement in the opposite direction achieved?
If a muscle is unable to push, how is movement in the opposite direction achieved?
What is the relationship between actin and myosin during muscle contraction, according to the sliding filament mechanism?
What is the relationship between actin and myosin during muscle contraction, according to the sliding filament mechanism?
Why is the arrangement detailed in Topic 15.7 important to consider when discussing muscle contraction?
Why is the arrangement detailed in Topic 15.7 important to consider when discussing muscle contraction?
How does the arrangement of skeletal muscles facilitate movement around joints?
How does the arrangement of skeletal muscles facilitate movement around joints?
Flashcards
Antagonistic muscles
Antagonistic muscles
Muscles that work in opposite pairs to move a limb in different directions.
Sliding filament mechanism
Sliding filament mechanism
The mechanism of muscle contraction where actin and myosin filaments slide past each other.
Function of skeletal muscles
Function of skeletal muscles
Skeletal muscles work together to maintain posture and generate movement.
Muscle contraction
Muscle contraction
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Study Notes
- Skeletal muscles facilitate movement by attaching to the skeleton.
- The human skeleton is made of bone which is incompressible.
- Tendons transmit the force of muscle, enabling bone movement.
- Joints allow different parts of the skeleton to move relative to each other.
- Muscle contraction enables movement of a skeleton part, such as a limb, in one direction.
- Muscles can only pull, not push.
- Moving a limb in the opposite direction requires an antagonistic muscle.
- An antagonistic muscle works in opposition to the first muscle.
- When one muscle contracts, its partner muscle relaxes, ready to contract again.
- Skeletal muscles operate in antagonistic pairs, pulling in opposite directions.
- When one muscle in the pair contracts, the other relaxes.
- Muscle fiber contraction involves the arrangement of various proteins.
- Actin and myosin filaments slide past each other during contraction.
- The sliding filament mechanism describes how muscle contraction occurs.
- Functioning of muscle depends on the molecular shapes of the four main proteins involved.
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