Micro Muscle Quiz A
Name__________________________________Hr_________Date________________________
I. Stem Matching
Stem
Definition
_________ calat
A. Stiff
_________ erg
B. Muscle
_________ fasc
C. Equal
_________ gram
D. Something inserted
_________ hyper
E. Hidden
_________ inter
F. Flesh
_________ iso
G. Together
_________ laten
H. Something written
_________ myo
I. Well fed
_________ reticul
J. Between
_________ sarco
K. One of free will
_________ syn
L. Work
_________ tetan
M. Stretched
_________ tonic
N. A net
_________ troph
O. Over, more
_________voluntar
P. Bundle
II. Vocab Matching
Word
Definition
A. A narrow extracellular space between presynaptic
and post synaptic neuron
___________ Acetylcholinesterase
B. Impulse propagated along the sarcolemma into the
transverse tubules
___________ Cisternae
C. Contractile fibers in muscle cells
___________ Motor end plate
D. Enlarged portion of the sarcoplasmic reticulum near
the actin and myosin filaments of a muscle fiber
___________ Motor neuron
E. Specialized part of a muscle fiber membrane at a
neuromuscular junction
___________ Muscle impulse
___________ Myofibrils
F. Muscle contract when the thin (actin) and thick
(myosin) filaments move past each other, shortening
the skeletal muscle cells
G. Protein that attaches myosin filaments to the z lines
in muscles
___________ Myosin
H. Enzyme that catalyzes the breakdown of
acetylcholine
___________ Neurotransmitters
___________ Sarcomeres
I. Membranous network of channels and tubules in a
muscle fiber, corresponding to the endoplasmic
reticulum of the other cells
J. Structural and functional unit of the myofibril
___________ Sarcoplasmic Reticulum
K. Neuron that transmits impulses from the central
nervous system to an effector
___________ Sliding Filament Model
___________ Synaptic Cleft
L. Chemicals that an axon end secretes that stimulates
a muscle fiber to contract or a neuron to fire an
impulse
M. Protein that functions with tropomyosin to block
muscle contraction until calcium ions are present
___________ Titin
N. Protein that, with actin, contracts and relaxes
muscle fibers.
___________ Troponin
.
III. Multiple choice. Write the correct letter on the blank to the left of the question.
1. __________ Muscle fibers contract when they receive signals from the ___________ system.
A. Skeletal
B. Respiratory
C. Nervous
D. Digestive
2.__________Which of the following proteins is not part of the thin filament
A. Tropomysosin
B. Titin
C. Actin
D. Troponin
3. _________ 80% of a muscle fiber’s volume is made of
A. Sarcoplasmic Reticulum
B. Fascicles
C. Myofibrils
D. Perimysium
4._________ The neurotransmitter used to stimulate muscle contraction is called
A. Dopamine
B. Epinephrine
C. Serotonin
D. Acetylcholine
5._________ The ___________ runs through the middle of the I band
A. Z-disk
B. H-Zone
C. Synapse
D. T-Tubule
6.________ Skeletal muscle contraction is called:
A. Peristalsis
B. a twitch
C. a beat
D. a pull
7.________ A forceful, sustained contraction is called a _____________ contraction.
A. latent
B. tetanic
C. summation
D. threshold
8. _______ The spot where T-tubules and terminal cisternae meet is called
A. triad
B. synaptic cleft
C. vesicle
D. motor plate end
9. ________ The ions that bind to troponin are made of this element
A. Sodium
B. Carbon
C. Magnesium
D. Calcium
10.________The conductive cell membrane the covers the muscle fiber is called the
A. Sarcolemma
B. Epimysium
C. Sarcoplasmic reticulum
D. Troponin
11.________ The space in the middle of the A band is called the
A. Z- disk
B. H-zone
C. Fascicle
D. Synapse
IV. Diagram Identify the following structures
Word bank
3
(Not all words will be used)
A. Fascicle
2
1._________
B. Endomysium
C. Osteomysium
1
2._________
D. Perimysium
4
3._________
5
E. Eccomysium
F. Muscle fiber
G. Sarcomere
4._________
H. Epimysium
I. Trabeculae
5._________
V. Ordering. List the order of actions (1-4) that occur in the sliding filament model. Start with
myosin binding to the thin filament.
_________ Myosin pulls the thin filament to the center of the sarcomere
_________ Myosin binds to actin
_________ Myosin uses ATP to restore its head to the “cocked” position
_________ ATP binds to myosin causing it to release from the thin filament
***Extra Credit*** (2 pts each)
What is one advantage of fast twitch muscles and one advantage of slow twitch muscles?
Name and describe one muscle disorder. Include how it is treated