Ch.15 Muscle Activity

Question 1

flexion

Answer 1

decreasing the angle between two bones,

bending a limb

Question 2

extension

Answer 2

increasing the angle between two bones,

straightening a limb

Question 3

abduction

Answer 3

movement away from the midline of the body

Question 4

adduction

Answer 4

movement toward the midline of the body

Question 5

rotation

Answer 5

circular movement around an axis (central point)

Question 6

internal rotation

Answer 6

toward the center of the body

Question 7

external rotation

Answer 7

away from the center of the body

Question 8

dorsiflexion

Answer 8

decreasing the angle of the ankle joint so that the foot bends backward (upward).

Question 9

plantar flexion

Answer 9

motion that extends the foot downward toward the ground as when pointing the toes.

Question 10

supination

Answer 10

turning the palm up

outward roll of foot

Question 11

pronation

Answer 11

turning the palm down

inward roll of the foot