Ch6

Question 0

Prefix — refers to “flesh”

Answer 0

sarco

Question 1

Contraction of muscles is due to the movement of —.

Answer 1

microfilaments

Question 2

Skeletal and smooth muscle cells are elongated. For this reason, these types of muscle cells called — —.

Answer 2

Muscle fibers

Question 3

What are the main three muscles that move the forearm?

Answer 3

Anterior biceps brachii
Anterior and lateral bracioradialis
Posterior triceps brachii

Question 4

What is the arrangement of the smaller structure that provides banding patterns on skeletal muscle?

Answer 4

Myofilaments

Question 5

— provides final ‘go’ signal for muscle contraction.

Answer 5

Calcium

Question 6

Within skeletal muscle, not all fibers may be
stimulated during the same interval.
True or false?

Answer 6

True

Question 7

What is the muscle that raises

corners of the mouth?

Answer 7

Zygomaticus

Question 8

What is the muscles that closes mouth and

protrudes the lips?

Answer 8

Orbicularis oris

Question 9

What are the chewing muscles?

Answer 9

 Masseter—closes the 
jaw and elevates 
mandible 
 Temporalis—synergist 
of the masseter, closes 
jaw

Question 10

What muscle pulls the corners of the mouth

inferiorly ?

Answer 10

Platysma

Question 11

What muscle flexes the neck, rotates the head?

Answer 11

Sternocleidomastoid

Question 12

What are the muscles composed of abdomen girdle?

Answer 12

Rectus Abdominis
External and internal obliques
Transversus Abdominis

Question 13

Which posterior muscle makes back

extension

Answer 13

Erector spinae

Question 14

Which posterior muscle flexes the spine laterally?

Answer 14

Quadratus lumborum

Question 15

Which muscle supinates forearm, flexes elbow?

Answer 15

Bicep brachii

Question 16

What muscles involve in elbow flexion?

Answer 16

Bicep brachii, brachialis

Question 17

What is antagonist to biceps brachii and works on elbow extension?

Answer 17

Tricep brachii

Question 18

Which muscle works on hip abduction, steadies pelvis when walking?

Answer 18

Gluteus medius

Question 19

Which muscle works on hip flexion, keeps the
upper body from falling backward
when standing erect?

Answer 19

Iliopsoas

Question 20

Which muscle flexes the thigh?

Answer 20

Sartorius

Question 21

What are the Muscles causing movement

at the knee joint?

Answer 21

Hamstring group
(Bicep femoris, semimembranosus, semitendinosus)
Sartorius
Quadriceps group

Question 22

What are the quadriceps group?

Answer 22

Muscles in leg that extend knee
Rectus femoris
Three vastus muscles (vastus lateralis, vastus intermedius, vastus medialis)

Question 23

What muscles work on dorsiflexion and foot

inversion?

Answer 23

Tibialis anterior

Question 24

What muscle work on toe extension and dorsiflexion of the foot?

Answer 24

Extensor digitorum longus

Question 25

What muscles work on dorsiflexion?

Answer 25

Extensor digitorum longus | Tibialis anterior

Question 26

Which muscle works on plantar flexion and everts foot?

Answer 26

Fibularis muscles

Question 27

What muscles work in plantar flexion?

Answer 27

Fibularis muscles, soleus, gastrocnemius Together Soleus and Gastrocnemius via the Calcaneal tendon plantarflex the foot

Question 28

What are the antagonist of the hamstring group?

Answer 28

Quadriceps on anterior thigh

Question 29

What are two good sites for intramuscular injections in adult?

Answer 29

Gluteus medius, deltoid

Question 30

What are the common characteristics of all types of muscles?

Answer 30

Elongated (skeletal & smooth), contract by myofilaments (actin & myosin), has prefix (myo, mys, sarco)

Question 31

Three characteristics of smooth muscle

Answer 31

Visceral, non-striation, involuntary

Question 32

Three characteristics of cardiac muscle

Answer 32

Cardiac, striated, involuntary

Question 33

In microscopic muscle, where is the calcium stored and released on demand for muscle contraction?

Answer 33

Sarcoplasmic recticulum

Question 34

What are the properties of muscle cells?

Answer 34

Excitability, contractility (Responsiveness, shorten) Which leads to extensibility and elasticity

Question 35

What is the sliding filament theory?

Answer 35

Activation by nerve causes myosin head to attach to binding site of thin filament. Then, myosin head pull the actin filament to the center of sarcomere. Continue this action causes a sliding actin filament along the myosin. This results in muscle contraction

Question 36

What is muscle movement that combines flexion, extension, addiction, or abduction?

Answer 36

Circumduction

Question 37

What is the antagonist of sternocleidomastoid?

Answer 37

Trapezius that extends head and which elevate, depress, adduct, and stabilize scapula

Question 38

The neurotransmitter --- is vital to proper muscle functioning.

Answer 38

Acetylcholine

Question 39

Referring to the muscle attachment to bone, --- is the immovable attachment site.

Answer 39

Origin

Question 40

Exercise throughout life helps to retain both --- and ---.

Answer 40

Strength and mass

Question 41

A fascicle is wrapped by a layer of connective tissue called ---.

Answer 41

Perimysium

Question 42

The muscle whose action is dorsiflexion and inversion of foot is the ---.

Answer 42

Tibialis anterior

Question 43

Muscles that are concerned with bracing actions are called ---.

Answer 43

Fixators

Question 44

The bending or movement of a limb toward the midline of the body is known as ---.

Answer 44

Adduction

Question 45

The nuclei of skeletal muscle cells are pushed aside by long, ribbonlike organelles called ---, which nearly filled with cytoplasm.

Answer 45

Myofibrils

Question 46

Muscles have several ---- --- that influence their force and degree of shortening.

Answer 46

Fascicle arrangement

Question 47

What muscles are making facial expressions?

Answer 47

Frontali, orbicularis oculi, orbicularis oris, Zygomaticus