Core 2: CQ1 P2 Flashcards
Gut wall
When it contracts it pushes food along
Involuntary muscle
Muscle that forms the wall of your heart, it works non-stop through life
Has its own blood supply
Voluntary muscle
Attached to bones
Work when you want them too
Functions that muscle tissue serves through contracting and relaxing
Produce movement
Provide stabilisation- posture and internal organs
Generate heat to maintain body temperature
Movement is produced when
Muscles exert force on tendons which pull on articulating bones or other structures
Muscles can only pull not push
Agonist muscle
Prime mover
Provides the main force that causes the desired movement
Antagonist
Muscles that react
Opposes or reverses a particular movement
Works with agonist in pairs
Stabilizer
Synergists and fixators
Aids agonists by promoting the same movement or by reducing unnecessary movement or undesired action
Act at a joint to stabilise it, giving muscle fixed base
Muscle tension
The force that is produced when a muscle contracts the load is the force extended on a muscle by a weight
Isotonic contraction & two parts of it
Causes the muscle to change length as it contracts and causes movement of a body part
Concentric (shortening of muscle)
Eccentric (lengthening of muscle)
Concentric contraction
Prime mover -agonist
Muscle shortens during contraction ( sliding filament theory)
Most common
Eccentric contraction
Opposite of concentric
Occur when muscle lengthens as it contracts
(Running downhill, kicking a football)
Isometric contraction
No change in muscle length during contraction (held in fixed position)
Used for rehab as well as general strengthening without placing stress on joints
(No change in muscle length but increase in muscle tension)
Artery wall
When contracts it squirts blood along
