Soc 14 - Muscular System Flashcards
What muscle moves the arm in all directions?
The deltoid
Which muscle covers the chest?
Pectoralis major
What muscle abducts and extends the arm at the shoulder?
The latissimus dorsi
Which two muscles make up your arm?
Bicep and tricep
Which muscle is beside the abdomen which runs from the lower half of the ribs to the pelvis?
External obliques
Which muscle forms the buttocks?
The gluteals
Which muscle moves the leg and knee towards the body?
Hip flexors
Which muscles extend the leg at the knee?
Quadracepts
Which muscle flexes the leg at the knee?
Hamstring
Which muscle performs plantar flexion?
Gastrocnemius
Which muscle runs down the shin?
Tibialis anterior
What is a fulcrum?
The point around which the lever rotates
What is articulation?
The state of having a joint; being a jount
What is it to articulate?
Act as a joint
What are muscle fibres?
Make up voluntary muscles; they are divided into type 1, type 2a and 2x
What are type 1 muscle fibres?
Slow twitch fibres suited to low intensity work. They can go a long time without fatiguing
What are type 2a muscle fibres?
Fast twitch muscle fibres used in anaerobic work. They can be improved by endurance work to help deal with fatigue
What are type 2x muscle fibres?
Fast twitch muscle fibres used in anaerobic work and can generate much grater force than other fibres, however they fatigue quickly
What is myoglobin?
A red pigment that transports oxygen to the muscles
