Muscular System

Question 1

Skeletal Muscle (voluntary)

Answer 1

Skeletal muscle fibers are multinucleated structures that compose the skeletal muscle.

Question 2

Cardiac Muscle (involuntary)

Answer 2

Cardiac muscle are only found in the heart

Question 3

Smooth Muscle (involuntary)

Answer 3

Smooth muscles are called so because they do not have striations. These can be found in hollow organs such as bladder, stomach, uterus, intestines, and passageways of circulatory system.

Question 4

Exicability

Answer 4

Able to send electrical waves (action potential) along the entire length

Question 5

Elasticity

Answer 5

Having the ability to recoil back to its original length

Extensibility

Question 6

Extensibility

Answer 6

Allows muscles to stretch or 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

Pronator teres

Answer 17

Pronation;

Turns hand palm down

Question 18

Supinator

Answer 18

Supination;

Turns hand palm-up

Question 19

Biceps Brachii

Answer 19

Flexion: Supination

Performs a bicep curl; also allows palm of hand toward body while flexing.

Question 20

Triceps Brachii

Answer 20

Extension

Extends Forearm, as during a punch.

Question 21

Pectoralis Major

Answer 21

Flexion; Adduction, Medial Rotation

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

Question 22

Latissimus Dorsi

Answer 22

Humerus: Extension, Adduction, and Medial Rotation
Scapula: Depression
Moves elbow back (as in elbowing someone standing behind you); spreads elbows apart.

Question 23

Deltoid

Answer 23

Abduction: Flexion, Extension, Medial and lateral rotation

Lift arms at shoulder

Question 24

Subclavius

Answer 24

Depression

Stabilizes clavicle during movement by depressing it

Question 25

serratus anterior

Answer 25

Scapula: Protracts: Ribs: Elevates | Moves body from side of body to front of body. Assists with inhalation.

Question 26

Trapezius

Answer 26

``` Scapula: Rotates Inferiorly, retracts elevates and depresses spine extends Elevates Shoulders (shrugging) pulls shoulder blades together, tilts head backward. ```

Question 27

Rhomboid Major

Answer 27

Retracts: Rotates: Inferiorly | Stabilizes Scapula during Pectoral girdle movement

Question 28

Supraspinatus

Answer 28

Abduction | Rotates the elbow outwards as during a tennis swing.

Question 29

Teres major

Answer 29

Extension: Adduction | Assists the infraspinatus in rotating the elbow outwards

Question 30

Gastrocnemius

Answer 30

Foot: Plantar Flexion Tibia/Fibula: Flexion Lowers the sole of the foot to the ground, as when foot tapping or jumping; it also assists in moving the back of the lower legs up and back towards the buttocks

Question 31

Soleus

Answer 31

Plantar Flexion | Lowers the sole of the foot to the ground, as when foot tapping or jumping; it also maintains posture while walking.

Question 32

Tibialis Posterior

Answer 32

Plantar Flexion | Lowers the sole of the foot to the ground, as when foot tapping or jumping.

Question 33

Flexor digitorum longus

Answer 33

Foot: Plantar Flexion and Inversion Toes: Flexion Lowers the sole of the foot to the ground, as when foot tapping or jumping. It also bends the inside of the foot upward and flexes the toes

Question 34

Flexor Hallicis Longus

Answer 34

Big Toe: Flexion Foot: Plantar Flexion Flexes the big toe.

Question 35

Tibialis Anterior

Answer 35

Dorsiflection, Inversion 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 36

Extensor Hallucis Longus

Answer 36

Foot: Dorsiflexion Big Toe: Extension Raises the sole of the foot off the ground, as when preparing to foot tap; extends the big toe.

Question 37

Extensor digitorum longus

Answer 37

Foot: Dorsiflexion Toes: Extension Raises the sole of the foot off the ground, as when preparing to foot tap; extends the toes.

Question 38

biceps femoris

Answer 38

Tibia/Fibula: Flexion Thigh: Extension, Lateral rotation. Moves the back of the lower leg up and back towards the buttocks, as when kneeling; also moves the thigh down and back and twists the thigh (Lower leg) outward

Question 39

Rectus Femoris

Answer 39

Tibia/Fibula: Extension Thigh: Flexion Moves the lower leg out in front of the body as when kicking.

Question 40

Adductor longus

Answer 40

Adduction, Flexion; Brings the thighs back together, it also assists with raising the knee.

Question 41

iliacus

Answer 41

Thigh: flexion and lateral rotation Torso: flexion Raises the knee at the hip, as if performing a knee attack, it also assists the lateral rotators in twisting the thigh (and lower leg) outward, and assists with bending over and maintaining posture.

Question 42

gluteus maximus

Answer 42

Extension; Lowers the knee and moves the thigh back, as when getting ready to kick a ball.

Question 43

gluteus medius

Answer 43

Abduction; Opens the thigh, as when doing a split.

Question 44

gluteus minimus

Answer 44

Abduction; Brings the thighs back together.