Muscular System

Question 1

Skeletal Muscle

Answer 1

voluntary, striated

Question 2

Cardiac Muscle

Answer 2

involuntary, heart muscle, striated

Question 3

Smooth Muscle

Answer 3

involuntary, not striated

Question 4

Exicability

Answer 4

able to send electrical waves along the entire length

Question 5

Elasticity

Answer 5

Having the ability to recoil to the original length

Question 6

Extensibility

Answer 6

Allows muscles to stretch and extend

Question 7

Contractility

Answer 7

Allows muscles to pull on its attachment and shorten

Question 8

Fascicle

Answer 8

The muscle fibers that are arranged in bundles

Question 9

Epimysium

Answer 9

Outermost layer, surrounds entire muscle

Question 10

Perimysium

Answer 10

Separates and surrounds fascicles

Question 11

Endomysium

Answer 11

Surrounds each individual muscle fiber

Question 12

Sarcolemma

Answer 12

Muscle fiber membrane

Question 13

Myofibril

Answer 13

Individual parallel muscle fibers (made up of actin and myosin)

Question 14

Sarcoplasm

Answer 14

Inner material surrounding the myofibril (equivalent to the cell’s cytoplasm)

Question 15

Actin

Answer 15

Thin filaments

Question 16

Myosin

Answer 16

Thick filaments

Question 17

Subclavius

Answer 17

Target motion direction: Depression

Movement: Stabilizes clavicle during movement by depressing it

Question 18

Serratus Anterior

Answer 18

Target motion direction: Scapula protracts; Ribs elevate

Movement: Moves arms from from side of body to front of body; assists with inhalation

Question 19

Trapezius

Answer 19

Target motion direction: Scapula rotates inferiorly, retracts, elevates, and depresses; Spine extends
Movement: Elevates shoulders (shrugging), pulls shoulder blades together, tilts head backwards

Question 20

Rhomboid Major

Answer 20

Target motion direction: Retracts; rotates inferiorly

Movement: Stabilizes scapula during pectoral girdle movement

Question 21

Pectoralis Major

Answer 21

Target motion direction: Flexion, adduction, medial rotation

Movement: Brings elbows together, moves elbow up (as during an uppercut punch)

Question 22

Latissimus dorsi

Answer 22

Target motion direction: Humerus extension, adduction, and medial rotation; scapula depression
Movement: moves elbow back (as if elbowing someone behind you); spreads elbows apart

Question 23

Deltoid

Answer 23

Target motion direction: Abduction, flexion, extension, and medial and lateral rotation
Movement: lifts arms at the shoulder

Question 24

Supraspinatus

Answer 24

Target motion direction: abduction

Movement: rotates the elbow outwards (as if during a tennis swing)

Question 25

Teres Major

Answer 25

Target motion direction: extension, adduction | Movement: Assists the infraspinatus in rotating the elbow outwards

Question 26

Biceps Brachii

Answer 26

Target motion direction: flexion, supination | Movement: performs a bicep curl, also allows palm of hand to point toward the body while flexing

Question 27

Triceps Brachii

Answer 27

Target motion direction: extension | Movement: extends forearm (as in a punch)

Question 28

Pronator teres

Answer 28

Target motion direction: Pronation | Movement: Turn hands palm-down

Question 29

Supinator

Answer 29

Target motion direction: Supination | Movement: Turn hands palm-up

Question 30

Iliacus

Answer 30

Target motion direction: thigh: flexion and lateral rotation; torso: flexion Movement: raises the knee at the hip, as if performing a knee attack; also assists the lateral rotators in twisting the thighs (and lower leg) outward, and assists with bending over and maintaining posture

Question 31

Gluteus Maximus

Answer 31

Target motion direction: Extension | Movement: lowers the knee and moves the thigh back, as when getting ready to kick a ball

Question 32

Gluteus Medius

Answer 32

Target motion direction: Abduction | Movement: opens the thighs like when doing a split

Question 33

Gluteus Minimus

Answer 33

Target motion direction: Abduction | Movement: brings the thighs back together

Question 34

Adductor Longus

Answer 34

Target motion direction: adduction; flexion | Movement: brings the thighs back together; also assists with raising the knee

Question 35

Rectus Femoris

Answer 35

Target motion direction: tibia/fibula: extension; thigh: flexion Movement: moves the lower leg out in front of the body, as if kicking; also assists in raising the knee

Question 36

Biceps Femoris

Answer 36

Target motion direction: tibia/fibula: flexion; thigh: extension, lateral rotation Movement: moves the back of the lower leg up and back towards the buttocks, as when kneeling; moves the thigh down and back and twists the thigh (and lower leg) outward

Question 37

Tibialis Anterior

Answer 37

Target motion direction: dorsiflexion; inversion Movement: raises the sole of the foot off the ground as when preparing to foot-tap; bends the inside of the foot upwards, as when catching your balance while falling laterally toward the opposite side as the balancing foot

Question 38

Extensor Hallucis Longus

Answer 38

Target motion direction: foot: dorsiflexion; big toe: extension Movement: raises the sole of the foot off the ground as when preparing to foot-tap; extends big toe

Question 39

Extensor Digitorum Longus

Answer 39

Target motion direction: foot: dorsiflexion; toes: extension | Movement: raises the sole of the foot off the ground as when preparing to foot-tap; extends toes

Question 40

Gastrocnemius

Answer 40

Target motion direction: foot: plantar flexion; tibia/ fibula: flexion Movement: lowers the sole of the foot to the ground, as in when foot tapping or jumping; also assists in moving the back of the lower legs up and back to the buttocks

Question 41

Soleus

Answer 41

Target motion direction: plantar flexion | Movement: lowers the sole of the foot to the ground as when foot tapping or jumping; also maintains posture when walking

Question 42

Tibialis Posterior

Answer 42

Target motion direction: plantar flexion | Movement: lowers the sole of the foot to the ground as when foot tapping or jumping

Question 43

Flexor Digitorum Longus

Answer 43

Target motion direction: foot: plantar flexion and inversion; toes: flexion Movement: lowers the sole of the foot to the ground as when foot tapping or jumping; also bends the inside of foot upward and flexes the toes

Question 44

Flexor Hallucis Longus

Answer 44

Target motion direction: big toe: flexion; foot: plantar flexion Movement: flexes the big toe