Soc 14 - Muscular System Flashcards
Voluntary muscles
Voluntary muscles are undr your control, you can choose when to contract or relax them. All these muscles are attatched to the skeleton via tendons. When your muscles contract movement takes place.
Involuntary muscles
Involuntary muscles are not under our control. They contract and relax automatically controlled by the involuntary nervous system. They can be found in the digestive organs, circulatory and urinary systems.
Cardiac muscles
Only found in the wall of the heart it is a vert specialised type pf involuntary muscle. Cardianmuscle is made up of interlaced fibres. These fibres can spread electronical signals from the brain right through the heart so that all the cells can contract together. This regulates your heart rate and means that when you excercise your heart keeps pumping in the right way.
Deltoid function?
Move arm in all directions at the shoulder
Pectoralis major function?
Adduct the arm at the shoulder
Latissiums dorsi function?
Adduct and expand the arm at the shoulder
Biceps function?
Flex the arm at the elbow
Triceps function?
Extend the arm at the elbow
External obliques function?
Pulls the chest downwords flex and rotate the spiral column
Gluteals function?
Adduct and expand up at the hips, pulls the leg backwards
Hip flexors function?
Flex the hip, helps move the leg and knee towards the back.
Quadriceps function?
Extend the leg at the knee
Hamstrings function?
Flex the leg at the knee
Gastocnemius function?
Point the toes, help flex the knee
Tibialis anterior function?
Pull the toes upwards the shin
