Mascular System

Question 1

Three basic muscle types are found in the body

Answer 1

 Skeletal muscle
 Cardiac muscle
 Smooth muscle

Question 2

Muscle that attached to the bone, facial muscle, to skin.

Answer 2

Skeletal Muscle

Question 3

Attach to the walls of the heart

Answer 3

Cardiac

Question 4

Attach to hallow visceral organs but not heart.

Answer 4

Smooth muscle

Question 5

Contraction of muscles is due to the movement of _____

Answer 5

microfilaments

Question 6

sacro

Answer 6

flesh

Question 7

myo or mys

Answer 7

muscle

Question 8

muscles used in moving from one place to another

Answer 8

somatic

Question 9

muscles that regulate internal environment

Answer 9

visceral

Question 10

muscles that move the skin; facial expression

Answer 10

integumentary

Question 11

Raises an opening

Answer 11

levator

Question 12

Lowers an opening

Answer 12

Depressor

Question 13

Regulates an opening

Answer 13

Sphincters

Question 14

cord-like structures
 Mostly collagen fibers
 Often cross a joint due to toughness and small size

Answer 14

Tendon

Question 15

sheet-like structures
 Attach muscles indirectly to bones, cartilages, or connective tissue
coverings

Answer 15

Aponeuroses

Question 16

contractile unit of a muscle fiber

Answer 16

sacromere

Question 17

myosin filaments

Answer 17

thick filaments

Question 18

actin filaments

Answer 18

thin filaments

Question 19

Composed of the protein myosin
 Has ATPase enzymes
 Myosin filaments have heads (extensions, or cross bridges)
 Myosin and actin overlap somewhat

Answer 19

thick filaments

Question 20

Composed of the protein actin
 Anchored to the Z disc

Answer 20

thin filaments

Question 21

chemical released by nerve upon arrival of nerve
impulse

Answer 21

neurotransmitter

Question 22

The neurotransmitter for skeletal muscle is___

Answer 22

Acetylcholine

Question 23

Once started, muscle contraction can be
stopped. True or false?

Answer 23

False. Cannot.

Question 24

Myofilaments are able to slide past each other
during contractions

Answer 24

Isotonic contractions

Question 25

Tension in the muscles increases

Answer 25

Isometric contractions

Question 26

Decreases the angle of the joint  Brings two bones closer together  Typical of hinge joints like knee and elbow

Answer 26

Flexion

Question 27

Opposite of flexion  Increases angle between two bones

Answer 27

Extension

Question 28

pulls the corners of the mouth inferiorly

Answer 28

Platysma

Question 29

flexes the neck, rotates the head

Answer 29

Sternocleidomastoid

Question 30

adducts and flexes the humerus

Answer 30

Pectoralis Major

Question 31

raise rib cage during inhalation

Answer 31

External intercostals

Question 32

depress the rib cage to move air out of the lungs when you exhale forcibly

Answer 32

Internal intercostals

Question 33

flexes vertebral column and compresses abdominal contents (defecation, childbirth, forced breathing)

Answer 33

Rectus abdominis

Question 34

flex vertebral column; rotate trunk and bend it laterally

Answer 34

External and internal obliques

Question 35

compresses abdominal contents

Answer 35

Transversus abdominis

Question 36

elevates, depresses, adducts, and stabilizes the scapula

Answer 36

Trapezius

Question 37

extends and adducts the humerus

Answer 37

Latissimus dorsi

Question 38

back extension

Answer 38

Erector spinae

Question 39

flexes the spine laterally

Answer 39

Quadratus lumborum

Question 40

arm abduction

Answer 40

Deltoid

Question 41

supinates forearm, flexes elbow

Answer 41

Biceps Brachii

Question 42

Elbow Flexion

Answer 42

Brachialis

Question 43

Weak muscle

Answer 43

Brachioradialis

Question 44

elbow extension (antagonist to biceps brachii)

Answer 44

Triceps brachii

Question 45

hip extension

Answer 45

Gluteus maximus

Question 46

hip abduction, steadies pelvis when walking

Answer 46

Gluteus medius

Question 47

hip flexion, keeps the upper body from falling backward when standing erect

Answer 47

Iliopsoas

Question 48

adduct the thighs

Answer 48

Adductor muscles

Question 49

flexes the thigh

Answer 49

Sartorius

Question 50

extends the knee

Answer 50

Quadriceps group