Soc 14 Flashcards
Agonist
The muscle contracts
The muscle contracts
Agonist
Antagonist
The muscles relax
The muscle relaxes
Antagonist
Name the 4 antagonistic pairs and their locations
Biceps/triceps (elbow)
Hamstring/Quadriceps (knee)
Gastrocnemius/Tibialis anterior (ankle)
Gluteals/Hip flexor (hip)
Muscle fibres
Muscle fibres: make up voluntary (skeletal) muscle; divided into type I, type lla and type IIx.
Type I
Slow twitch muscle fibres; suited to low intensity work, e.g. marathon running, as they can be used for a long period without fatiguing.
Type Ila
Fast twitch muscle fibres used in anaerobic work; can be improved through endurance training to increase their resistance to fatigue.
Type Ilx
Fast twitch muscle fibres used in anaerobic work and can generate much greater force than other fibre types, but fatigue quickly.
Myoglobin:
A red pigment that transports oxygen to the muscles.
Muscle fibres
Voluntary muscle is made up of bundles of individual fibres. Each fibre contains many myofibrils, which are strands that can grab onto each other and pull to make the muscles contract.
What are the three types of muscles fibers?
Type I
Type IIa
Type IIx
What are the 2 fast twitch types
Type 2a and Type 2x
Fulcrum
the point around which the lever rotates.
Articulation
the state of having a joint; being a joint.
Articulate
act as a joint.
What is slow twitch type 1?
- Suit endurance activities - can work for long periods of time.
- They’re darker in colour because they contain Myoglobin, a red pigment that transports oxygen to the working muscles.
