Muscles

Question 1

Deltoid

Answer 1

This is used in all movements of the arms. It’s most important function is to lift the arm straight outwards and upwards (abduction at shoulder joint) eg. To make a block in volleyball using both arms above the head.

Question 2

Trapezius

Answer 2

This caused extension at the neck. Eg. A rugby forward in a scrum will use the trapezius to blind into the opponents.

Question 3

Latissimus dorsi

Answer 3

This sis the broad back muscle. It causes adulation at the shoulder joint. It will swing the arm backwards and rotate inwards. Eg. A tennis player serving will be using the latissimus dorsi.

Question 4

Pectorals

Answer 4

There are two retorts of muscles in the chest. Pectorals major and pectorals minor. This causes adduction and flexion at h shoulder joint in the horizontal plane. These help to adduct the arm and and rotate it inwards as well as lowering the shoulder blades. Eg. A rugby player performing a tackle wild be using his pectoral muscles.

Question 5

Biceps

Answer 5

This causes flexion at the elbow. It’s function is to swing the upper arm forwards and to turn the forearm so that the palm of the hand points upwards. Eg biceps curl in weight training.

Question 6

Triceps

Answer 6

This causes extension at the elbow. It’s function is to straighten the elbow and to swing the arm backwards. Eg. Backhand in table tennis

Question 7

Abdominals

Answer 7

These Bend the body forwards at the hips causing flexion of the vertebral column and help to turn the upper body. Eg. Performing sit-ups

Question 8

Quadriceps

Answer 8

This provides stability to the knee joint and extends or straightens the knee joint. Eg. Diving off a diving board.

Question 9

Hamstrings

Answer 9

These muscles will straighten the hip and cause flexion at the knee joint. They will also bend the knee and rotate it outwards. Wh a hockey player running across a pitch.

Question 10

Gluteals

Answer 10

These are the muscles in your buttocks. They cause extension at the hip joint and adduct the hip, rotates the thigh outwards and helps straighten he knee. Eg. a sprinter running down a track

Question 11

Gastrocnemius

Answer 11

The calf muscle is used to bend the knee and to straighten or plantar flex the ankle. Eg a swimmer doing front crawl will point heir toes in the leg action.