muscle functions

Question 1

Deltoid

Answer 1

Anterior fibers: Flex and medially rotate arm
Middle fibers: prime mover of arm abduction
Posterior fibers: extend and laterally rotate arm

Question 2

Biceps brachii

Answer 2

Flexes forearm, powerful supinator of forearm

Long head flexes arm

Question 3

Coracobrachialis

Answer 3

Adducts and flexes arm

Question 4

Brachialis

Answer 4

Primary flexer of forearm

Question 5

Triceps

Answer 5

Primary extensor of forearm

Long head of triceps also extends and adducts arm

Question 6

Quadratus femoris

Answer 6

Laterally rotates thigh

Question 7

Sartorius

Answer 7

Flexes thigh and rotates thigh laterally; flexes leg and rotates leg medially

Question 8

Gracilis

Answer 8

Adducts and flexes thigh; flexes leg

Question 9

Adductor longus

Answer 9

Adducts thigh; flexes thigh

Question 10

Biceps femoris

Answer 10

Extends thigh (long head only)
flexes leg (both)
laterally rotates leg (both)

Question 11

semitendinosus

Answer 11

extends thigh and flexes leg;

medially rotates leg

Question 12

semimembranosus

Answer 12

extends thigh and flexes leg;

medially rotates leg