Review Game Zone
Flash Cards
(current)
Games
Teachers
Search
Unit 03 Exam Review A- Skeletal Muscle
Test Description: Review of topics
Instructions: Answer all questions to get your test result.
1) muscle cells have a single action, they
A
contract, shortening in length
B
stretch, increasing in length
C
expand, increasing in length
D
contract, increasing in strength
2) a muscle that constricts an opening is a(n)
A
sphincter
B
extensor
C
antagonist
D
obdurator
3) the perimysium surrounds
A
an individual muscle fiber
B
a bundle of muscle fibers known as a fascicle
C
a bundle of myofibers known as a myofibril
D
a bundle of fascicles known as a muscle body
4) the special area of the sarcolemma at the neuromuscular junction is called the
A
motor beginning fork
B
motor middle spoon
C
motor end plate
D
the neuromyofloccular junction
5) quantal summation increases contraction strength by
A
recruiting additional motor units
B
increasing the duration of each muscle twitch
C
increasing the number of muscle twitches per unit time
D
increasing the contractile distance of each sarcomere along the muscle fiber
6) somatic motor neurons release the NT at the neuromuscular junction
A
norepinephrine
B
dopamine
C
acetylcholine
D
serotonin
7) each somatic motor neuron innervates a group of muscle fibers called a
A
motor unit
B
myobundle
C
fascicle set
D
muscle pool
8) muscle filaments come in two 'flavors'
A
thick, made of actin and thin, made of myosin
B
thick, made of troponin; and thin, made of tropomyosin
C
polar, positively charged ions; and non-polar, which have no charge
D
thick, made of myosin; and thin, made of actin
9) the functionally 'contractile' unit of a skeletal muscle fiber is a structure called the
A
myofibril
B
sarcomere
C
sarcoplasmic reticulum
D
sarcolemma
10) during muscle contraction, the
A
Z bands get closer together
B
the H band thickens
C
the M line moves laterally
D
the A band changes in size
11) myosin 'heads' bind to _______, forming _______
A
troponin, linkages
B
tropomyosin, Z-bands
C
actin, cross-bridges
D
sarcomeres, fascicles
12) the myosin heads are released by the binding of
A
actin
B
troponin
C
calcium ions
D
ATP
13) actin and myosin cannot bind until the blocking effect of ___ is removed
A
tropomyosin
B
tropactin
C
troponin
D
ADP
14) in the absence of ATP in the muscle, ____ sets in
A
atrophy
B
rigor mortis
C
tetanus
D
treppe
15) for muscle contraction to cease, ___ must be actively pumped into the _________
A
Sodium, transverse tublues
B
calcium; sarcoplamsic reticulum
C
troponin, actin potential
D
Potassium, sarcoplasm
16) the movement of the troponin-tropomyosin complex requires
A
Sodium Ions
B
acetylcholine
C
ATP
D
Calcium Ions
17) during muscle contraction, calcium release channels, to nobody's surprise, release calcium via a process called
A
facilitated diffusion
B
exocytosis
C
endocytosis
D
active transport
18) action potentials are conducted from the motor end plate through ___ into the interior of the muscle fiber
A
Myofibrils
B
Ryanodine receptors
C
T tubules
D
Sarcoplasmic Reticulum
19) what role(s) does ATP play in muscle contraction and relaxation?
A
it returns the myosin head to its 'active' state, ready to cross-bridge to actin
B
is causes the myosin head to detach from actin
C
all of the rest apply
D
it powers the calcium ion pump to return calcium to the endoplasmic reticulum
20) the inability of muscle cells to relax due to high frequency stimulation is
A
twich
B
recruitment
C
tetanus
D
treppe
*select an answer for all questions
Check Results & Get Answers
Play Games with the Questions Above
Teachers: Create FREE classroom games with your questions
Click for more info!
©2007-2024
ReviewGameZone.com
|
About
|
Privacy
|
Contact
|
Terms
|
Site Map
WAIT! Find what you needed?
×
Still Looking for the Answers?
Have Another Question?
Play a Review Game with These Questions?
Want to Make Your Own Test Like This One?