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WorksheetsTypes of Muscle Contractions
Total questions: 24
Worksheet time: 13mins
Skeletal Muscles pull on what to create movement?
Bones
Other Muscles
When the Muscle contracts, the Origin and the Insertion are drawn together,
Lengthening the Muscle
Shortening the Muscle
The bones attached to the muscle produce movement in a specific direction. This movement is called
the (a)
Muscle Origin (or fixed end):
The origin is the muscles point of attachment to a more stationary bone
The origin is the muscles more movable point
Tends to be proximal and closer to the main mass of the body.
Is often wide spread, helping 'anchor' the muscle
Muscle Action:
Skeletal muscles create movement by pulling on bones to which they are attached.
... They have a more rigid attachment to a bone at one end, & they are attached across a joint to another bone that is usually more movable. (the origin & insertion)
Vary in frequency
Muscle Insertion (the moving end):
Is the muscles more movable point, tending to be more distal from the mass of the body.
is closer to the main mass of the body
Usually attaches to the bone near the joint that is moved by the muscle
is rigid
Muscle Contraction:
When the muscle contracts, the origin and insertion are drawn together shortening the muscle.
When the muscle contracts, the origin and insertion are drawn together lengthening the muscle.
Skeletal Muscles work in pairs to
(a)
A muscle contracts on the anterior side of the body, whereas the muscles on the posterior side relaxes. These are called
(a)
Agonist:
causes the major action
must relax and lengthen
is a group of muscles ensuring the joint remains stable during the movement
muscle that contracts to produce movement
Antagonist:
must relax and lengthen to allow the movement to occur
muscle that relaxes and opposes the agonist
the muscle that assists the agonist to produce the required movement
Synergist:
must relax and lengthen
is the group of muscles that ensure the joint remains stable during the movement
the muscle that assists the agonist to produce the required movement
Stabiliser:
the muscle that assists the agonist to produce the required movement
is the group of muscles that ensure the joint remains stable during the movement
Reciprocal Inhibition:
is the process of one muscle contracting (agonist) while the other muscle relaxes (antagonist) to create movement
are the muscles that ensure the joint remains stable during the required movement
is the term used to describe how muscles work in pairs.
The types of muscle actions are:
Isometric, Isokinetic, Isoinertial
Isometric, Isokintic, Isoinertial
Isometrc, Isokinetic, Isoinertial
Isometric, Isokinetic, Isoinertal
Isometric Action:
A type of strength training that uses specialised machines
A muscle action where the muscle length remains constant while force is developed
Muscle action where the force is constant throughout the motion
- No significant action
- Tension Produced
- No joint action
- Pushing or pulling against an immovable
: Belongs to what kind of movement?
Isokinetic
Isometric
Isoinertial
Isokinetic Action:
A muscle action where the muscle length remains constant while force is applied
A muscle action where the force is constant
A type of strength training that uses specialised machines
- Speed a velocity is kept constant despite the forve applied to the resistance
- The machine works the muscle maximally & through the whole range of motion resulting in greatest improvements in strength
Isoinertial Action
Isokinetic Action
Isometric Action
Muscle action where the force is constant throughout the motion:
Isoinertial Action
Isokinetic Action
Isometric Action
There are two kinds of Isoinertial Actions...
What are they?
Eccentric
Concentic
Concentric
Eccentrc
What Factors Affect Muscle Strength?
Muscle fibre type and the speed of contraction
Fibre Arrangement and Muscle Fibre Recruitment
Gender Differences and Age Differences
All of the Above
Concentric Action:
Muscle shortens during effort
Bring together the origin and insertion
Muscle shortens to overcome the external force
All of the Above
Eccentric Action:
Muscle contraction lengthens during effort
The origin and Insertion move further apart
1 & 2 only
Muscle shortens during effort
