The Muscles Flashcards
What are agonists?
They are the prime movers. The main muscles responsible for creating a particular movement at a joint.
What are antagonists?
The muscle opposite the agonist. The muscle that relaxes when the agonists contracts.
What are assistors?
They help the agonist muscle to perform work. They may not be a prime mover but are still involved.
What are stabilisers?
These are muscles that hold a joint in place so that the exercise can be performed. They are not necessarily moving during the exercise but provide stationary support.
What it is the muscle function?
Generates force.
Muscles can pull and push; true or false?
False, muscles can only pull.
What are the three types of contractions?
Isotonic, isometric and isokinetic.
Define Isotonic
Same tension, length changes
Define Isometric
Same length, tension changes
Define Isokinetic
Same velocity, length changes and tension changes
What are the different types of muscle contractions?
Isotonic: Concentric and Eccentric.
Define Concentric
Muscle shortens
Define Eccentric
Muscle Lengthens
What is the gross Muscle structure?
Made up of muscle fibres. Each fibre is made up of long cells. Cannot be seen from surface. Grouped into bundles. Covered in fascia.
What is the microscopic muscle structure?
muscle fibres= multineucleaic cells Striations Myofibril Sarcomere Filaments (thick and thin) Actin Myosin Cross bridges
