Musculoskeletal System Flashcards
Lesson 6.1
What are the main components to the system?
The musculoskeletal system consists of bones, joints, and muscles that provide form, support, and stability to a body, thus giving humans (and many other animal species) the ability to move.
What are the 3 types of muscle?
Smooth, Cardiac and Skeletal.
What are smooth muscles?
Typically surround body’s internal organs, including the blood vessels, hair follicles, and the urinary, genital, and digestive tracts, are smooth muscles. Smooth muscle tissue contracts more slowly than skeletal muscles, but can remain contracted for longer periods of time. They are also involuntary
What are Cardiac Muscles?
As the name implies, they are responsible for pumping blood throughout the body. They contract involuntary (you’d be cooked if it were voluntary).
What are Skeletal Muscles?
Skeletal (AKA Striated or Striped) Muscles, are muscles that are attached to the bones via Tendons and/or other tissues.
What’s the system made of?
The body’s bones, skeletal muscles, and connective tissue that binds them together.
Skeletal Muscle fibre that connects directly to the bone via tough tissue fibres (Tendons).
The bones are tightly bound with other bones via Ligaments.
Cartilage tissue at the ends of bones prevents the bones from grinding against one another.
What are the three types of muscle contraction?
Concentric (Isotonic), Eccentric (Isotonic) and Isometric (Static).
What do Concentric and Eccentric do respectfully?
Concentric is muscle shortening and Eccentric is Muscle Lengthening.
What are major muscles on the front of the body?
Quads, Pects, Abdominus and rotator cuff.
Major muscles on the back of the body?
Gluteals, Hamstring, Calf muscles, Rhomboid anderector spinae.
What are Agonist/Antagonist muscle pairs?
It’s a group of muscles as ‘opposing pairs’ (think of Biceps/Triceps brachii and the quad region).
The muscle primarily responsible for the movement of a body part is the agonist and the muscle that counteracts this is the antagonist.
When you flex your biceps like a pullup, the bicep is the agonist and the triceps are the antagonist.
What is a muscle origin?
When a skeletal muscle contracts, the attached bone moves. The point where the muscle attaches to the more stationary of the bones of the axial skeleton is known as the origin
What’s the muscle insertion?
The other end, the point where the muscle attaches to the bone that is moved most, is known as the insertion.
