To allow for flexion, the __________ unlocks the knee joint.
0%
sartorius
0%
semimembranosus
100%
popliteus
0%
biceps femoris
Q.2.
At each end of the muscle, the collagen fibers of the epimysium, perimysium, and endomysium, come together to form a ________.
0%
pennate
0%
inversion
0%
insertion
0%
tendon
Q.3.
In rigor mortis
0%
-sustained contractions occur.-ATP is depleted.-the myosin heads are attached to actin.-calcium ions keep binding to troponin.
0%
active transport of calcium into the sarcoplasmic reticulum
0%
Ca2+ from the sarcoplasmic reticulum binds to troponin
0%
1. The activated myosin head binds to actin, forming a cross bridge.2. ADP is released and myosin slides the thin filament toward the center of the sarcomere.3. ATP binds to the myosin head and detaches it from actin.4. ATP is hydrolyzed to ADP and Pi and the energy released re-cocks the myosin head.
Q.4.
The origin of the long head of the triceps brachii is on the _______
0%
linea aspera of the femur
0%
infraglenoid tubercle of scapula
0%
pubic bone
0%
I Band
Q.5.
Both heads of the biceps femoris muscle __________.
0%
flex the hip
0%
flex the leg at the knee
0%
extend the leg at the knee
0%
extend the hip
Q.6.
The terminal cisternae that form a triad along with a T tubule are part of what organelle?
0%
thin & thick filaments
0%
sarcoplasmic reticulum
0%
radial tuberosity
0%
subscapularis muscle
Q.7.
A single contraction-relaxation cycle in a muscle fiber produces a(n)
0%
twitch
0%
mandible
0%
antagonist
0%
I Band
Q.8.
If Rob says he wants to make his "six-pack" muscles more visible, which muscle(s) is he going to exercise?
0%
parallel
0%
radial tuberosity
0%
lateral rotation
0%
rectus abdominis
Q.9.
fast fibers
0%
have low resistance to fatigue and quick twitches
0%
Ca2+ from the sarcoplasmic reticulum binds to troponin
0%
external oblique, rectus abdominis, and transverse abdominis
0%
mastoid process of temporal bone
Q.10.
The middle fibers of the deltoid muscle __________.
0%
posterior thigh
0%
adduct the arm
0%
zygomaticus major
0%
abduct the arm
Q.11.
Which of the following is true about the difference between cardiac muscle cells and skeletal muscle cells?
0%
During peak activity levels, glycolysis is the only pathway by which ATP can be produced to supply energy to the muscle.
0%
thin & thick filaments
0%
Their fibers branch.
0%
Cardiac muscle cells have intercalated discs where skeletal muscle cells do not.
Q.12.
The actions of the internal intercostals are most important during __________.
0%
muscle contraction
0%
forced expiration
0%
inspiration
0%
radial tuberosity
Q.13.
You try to pick up an object and discover that it is much heavier than you expected. Which process must occur in the muscle to increase tension so you can pick up the object?
0%
insertion
0%
popliteus
0%
rectus abdominis
0%
recruitment
Q.14.
The advantage of having many nuclei in a skeletal muscle fiber is the ability to
0%
radial tuberosity
0%
compression of the abdomen to assist in forced expiration
0%
sarcoplasmic reticulum
0%
produce large amounts of muscle protein
Q.15.
The external intercostals elevate the rib cage during __________.
0%
inspiration
0%
elevation
0%
insertion
0%
inversion
Q.16.
Which of the following muscles plays NO role in respiration?
0%
adduct the arm
0%
thin & thick filaments
0%
iliocostalis
0%
popliteus
Q.17.
The type of muscle whose functional characteristics most closely resemble those of its muscle fibers is the ________ muscle.
0%
opposition
0%
slow
0%
anconeus
0%
parallel
Q.18.
The anterior muscles of the thigh that originate on the os coxae are __________.
0%
rectus femoris; vastus medialis
0%
sartorius; vastus medialis
0%
vastus lateralis; vastus medialis
0%
sartorius; rectus femoris
Q.19.
The end of a muscle that remains stationary when the muscle contracts is called the
0%
origin
0%
elevation
0%
inspiration
0%
abduction
Q.20.
The most important factor in decreasing the intracellular concentration of calcium ion after contraction is
0%
latissimus dorsi
0%
Ca2+ from the sarcoplasmic reticulum binds to troponin
0%
inversion
0%
active transport of calcium into the sarcoplasmic reticulum
Q.21.
Which movement is NOT associated with the scapula?
0%
iliocostalis
0%
parallel
0%
opposition
0%
inspiration
Q.22.
The vastus intermedius __________ the leg at the knee.
0%
posteriorly
0%
elevation
0%
flexor
0%
extends
Q.23.
Which of the following best describes the term Z line?
0%
thin & thick filaments
0%
thin filaments are anchored here
0%
Their fibers branch.
0%
iliocostalis
Q.24.
The long head of the biceps femoris muscle originates on the __________.
0%
latissimus dorsi
0%
rectus abdominis
0%
linea aspera of the femur
0%
ischial tuberosity
Q.25.
The "kissing muscle" that purses the lips is the
0%
orbicularis oris
0%
pubic bone
0%
latissimus dorsi
0%
abduct the arm
Q.26.
In a ________ muscle, the muscle fibers and fascicles lie in a slanted or oblique position to the tendon.
0%
anconeus
0%
raphe
0%
pennate
0%
mandible
Q.27.
The origin of the rectus femoris is the ____________.
0%
anterior femur
0%
linea aspera
0%
greater trochanter
0%
anterior inferior iliac spine
Q.28.
At rest, the tropomyosin molecule is held in place by
0%
complete tetanus
0%
troponin molecules
0%
rectus abdominis
0%
iliocostalis
Q.29.
The brachialis muscle is located __________ to the biceps brachii muscle.
0%
superiorly
0%
laterally
0%
superficially
0%
deep
Q.30.
The end of a muscle that is attached to the point that moves when the muscle contracts is called the
0%
inversion
0%
insertion
0%
posteriorly
0%
elevation
Q.31.
When a skeletal muscle fiber contracts, the
0%
the zone of overlap gets larger
0%
intertubercular groove of humerus
0%
anterior, middle, posterior
0%
troponin molecules
Q.32.
The prime mover of hip extension is the __________.
0%
lateral rotation
0%
abduct the arm
0%
posterior thigh
0%
gluteus maximus
Q.33.
The brachioradialis is a strong forearm __________.
0%
supinator
0%
flexor
0%
pronator
0%
extensor
Q.34.
In a convergent muscle, fascicles converge on a common attachment site that may be a slender band of collagen fibers known as a(n)
0%
I Band
0%
popliteus
0%
raphe
0%
inversion
Q.35.
The muscle that raises the corners of the mouth as when smiling is the ________ muscle.
0%
complete tetanus
0%
latissimus dorsi
0%
transversus abdominis
0%
zygomaticus major
Q.36.
The actions of the rhomboid major on the scapula do NOT include __________.
0%
forced expiration
0%
latissimus dorsi
0%
lateral rotation
0%
muscle contraction
Q.37.
Interactions between actin and myosin filaments of the sarcomere are responsible for
0%
elevation
0%
muscle contraction
0%
complete tetanus
0%
lateral rotation
Q.38.
Which movement results after the contraction of the serratus anterior muscle?
0%
scapular protraction and rotation
0%
produce large amounts of muscle protein
0%
rectus abdominis
0%
thin filaments are anchored here
Q.39.
The latissimus dorsi inserts __________.
0%
mastoid process of temporal bone
0%
intertubercular groove of humerus
0%
infraglenoid tubercle of scapula
0%
transversus abdominis
Q.40.
The fascicle arrangement that permits the greatest exerted force applied to a tendon is __________.
0%
radial tuberosity
0%
True
0%
parallel
0%
insertion
Q.41.
Which of the following muscles compresses the abdomen?
0%
external oblique, rectus abdominis, and transverse abdominis
0%
anterior, middle, posterior
0%
the zone of overlap gets larger
0%
anterior inferior iliac spine
Q.42.
The angle of which muscle prevents the humeral head from sliding upward out of the joint as the arm is raised?
0%
radial tuberosity
0%
intertubercular sulcus
0%
subscapularis muscle
0%
linea aspera of the femur
Q.43.
The region of the sarcomere that always contains thin filaments is the
0%
I Band
0%
origin
0%
infraglenoid tubercle of scapula
0%
lateral rotation
Q.44.
Muscles that guard entrances and exits of internal passageways are ________ muscles.
0%
zygomaticus major
0%
circular
0%
complete tetanus
0%
parallel
Q.45.
Ryan hears a loud noise and quickly turns his eyes sideways in the direction of the sound. To accomplish this action he must use his ________ muscles.
0%
supraspinatus muscle
0%
iliopsoas; lesser trochanter
0%
sartorius; rectus femoris
0%
lateral & medial rectus
Q.46.
The tibialis anterior muscle dorsiflexes the foot at the ankle and also assists in __________ of the foot.
0%
plantar flexion
0%
eversion
0%
inversion
0%
extension
Q.47.
The teres major adducts the arm but does not __________ the arm.
0%
origin
0%
mandible
0%
abduct
0%
abduction
Q.48.
Which of the following become connected by myosin cross-bridges during muscle contraction?
0%
sarcoplasmic reticulum
0%
thin & thick filaments
0%
radial tuberosity
0%
During peak activity levels, glycolysis is the only pathway by which ATP can be produced to supply energy to the muscle.
Q.49.
The cross bridge cycle starts when _________.
0%
posterior thigh
0%
abduct the arm
0%
Ca2+ from the sarcoplasmic reticulum binds to troponin
0%
anterior inferior iliac spine
Q.50.
A muscle that opposes the action of another muscle is called its __________.
0%
anconeus
0%
antagonist
0%
circular
0%
posteriorly
Q.51.
All fibers of the pectoralis major muscle converge on the lateral edge of the__________.
0%
sartorius; rectus femoris
0%
radial tuberosity
0%
intertubercular sulcus
0%
lateral rotation
Q.52.
A muscle whose fascicles all pull in the same direction is a __________ muscle.
0%
opposition
0%
parallel
0%
scapular protraction and rotation
0%
circular
Q.53.
The action that moves the scapula towards the head is called __________.
0%
forced expiration
0%
flexor
0%
I Band
0%
elevation
Q.54.
The deltoid muscle fibers are separated into __________.
0%
anterior, middle, posterior
0%
intertubercular groove of humerus
0%
infraglenoid tubercle of scapula
0%
flex the leg at the knee
Q.55.
In a ________ muscle, the fascicles are concentrically arranged around an opening.
0%
forced expiration
0%
pennate
0%
I Band
0%
circular
Q.56.
The iliacus and the psoas major muscles are collectively known as the ____________ muscle because they share a common insertion on the __________ of the femur.
0%
iliopsoas; lesser trochanter
0%
iliopsoas; greater trochanter
0%
psoasiliacus; greater trochanter
0%
psoasiliacus; lesser trochanter
Q.57.
The two heads of the biceps brachii combine to insert on the __________.
0%
ulnar notch
0%
olecranon process
0%
radial tuberosity
0%
radial notch
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