Test #2 Flashcards
A synchondrosis would be categorized structurally and functionally as what type of articulation?
a) cartilaginous synarthrosis
b) fibrous amphiarthrosis
c) monoaxial synovial
d) fibrous diarthrosis
e) none of the above
A
Among the choices listed, which of the following synovial joint types (configurations) allows the most freedom of movement?
a) hindge
b) saddle
c) plane
d) pivot
B
joint movement that involves increasing the angle between the articulating bones is called…
a) protraction
b) flextion
c) adduction
d) supination
e) none of the above
E answer is extension
the movement that occurs at the ankle joint when you point your toes downward (or stand on tippy-toes) is called..
a) circumflexion
b) dorsiflexion
c) Plantar flexion
d) pronation
e) circumcision
C
The shoulder includes more than one actual articulation. Which of the following is NOT a part of the shoulder?
A) claviculohumeral joint
b) Acromioclavicular joint
c) the glenohumeral joint
d) all three are part of the shoulder complex
A
a herniated vertebral disc occurs when a misalignment of 2 vertebral bodies is “squished” out of the disk (called the ___) like jelly from a doughnut
a) nucleus fibrous
b) nucleus pulposus
c) annulus fibrous
d) annulus pulposus
e) none of the above
B
Many sports-related injuries of the knee involve sideways impact which causes the knee to buckle inward (medially). Which connective tissue is most often damaged during these injuries?
a) lateral meniscus
b) posterior cruciate ligament
c) medial collateral ligament
d) all 3 of these are usually injured with this impact
C
evaluate the following statement “smooth muscle cells have a spindle or tapered shape with single, central nucleus and no striations throughout the cell”
a) true
b) false
A) true
The connective tissue layer that surrounds a muscle fasicle is called the_____
a) myofibril
b) perimysium
c) myolemma
d) endomysium
e) none of the above
B
Which of the following is an accurate description of a TYPE 1 muscle fiber?
a) good at anaerobic metabolism
b) large size
c) very resistant to fatihue
d) strong contraction force
e) all of the above are accurate description
C
The function of Sarcoplasmic reticulum is to…
Store and release Ca2+ ions
Which of the following molecules is not part of the thin filament of a myofibril?
a) actin
b) tropomyosin
c) myosin
d) troponin
e) all of them are part of a thin filament
C
Cardiac muscle cells are connected to one another via specialized structures called __ which contain ion channels that allows the spread of electrical current throughout the heart’s musculature?
a) striated junctions
b) end plates
c) z-lines
d) interclated discs
e) none of the above
D
A sarcomere is defined as
a) all of the myofliaments held together by the m-line
b) the system of membranes that surrounds each myofibrils and store calcium
c) the parts of a myofibril (thick and thick filaments) found between two Z-lines)
d) a bundle of muscle cells surrounds be perimysium
e) none of the above statement are correct
C
Compared to skeletal muscle cells, which of the following is lacking in smooth muscle?
a) sarcomeres
b) transverse tubles
c) troponin
d) sarcoplasmic reticulum
e) all of the above are lacking in smooth muscle cells
E
