MUSCLES

Question 1

pectoralis major: action

Answer 1

the prime mover of arm flexion; rotates arm medially; adducts arms

Question 2

trapezius: action

Answer 2

moves scapula: elevates, retracts and depresses

Question 3

latissimus dorsi: action

Answer 3

the prime mover of arm extension; rotates arm medially; adducts arm

Question 4

deltoid: action

Answer 4

the prime mover of arm abduction; anterior part flexes - posterior part extends

Question 5

rotator cuff group: actions

Answer 5

All support shoulder joint and 
supraspinatus: initiates abduction of arm 
infraspinatus: laterally rotates arm 
teres minor: laterally rotates arm 
subscapularis: medially rotates arm

Question 6

gluteus maximus: action

Answer 6

extends thigh

Question 7

quadriceps femoris: actions

• rectus femoris
• vastus lateralis
• vastus medialis
• vastus intermedius

Answer 7

all extend leg at the knee point

rectus femoris: also flexes the thigh

Question 8

Hamstring: actions

• semitendinosus
• semimembranosus
• biceps femoris

Answer 8

all extend thigh and flex leg