Review Game Zone
Flash Cards
(current)
Games
Teachers
Search
Unit 03 Exam Review B- Skeletal And Cardiac Muscle
Test Description: Review of topics
Instructions: Answer all questions to get your test result.
1) smooth, controlled muscle contractions are due to
A
synchronous activation of motor units
B
pairwise activation of antagonistic motor units
C
synchronous deactivation of motor units
D
asynchronous activation of motor units
2) when a muscle cell generates tension but does not shorten, the 'contraction' is
A
eccentric
B
isokinetic
C
isometric
D
isotonic
3) a force- velocity curve shows a(n) ______ relationship between the force opposing the contraction and its velocity
A
direct
B
absence of
C
paradoxical
D
inverse
4) a reserve of high-energy phosphate is stored in muscle as
A
glucose-6-phosphate
B
phosphocreatine
C
adenosine diphosphate
D
creatine kinase
5) slow twitch muscle fibers have a ___ oxidative capacity and ___ glycogen content
A
high / high
B
high / low
C
low / low
D
low / high
6) muscle fatigue occurs when
A
pH inside the muscle fiber increases
B
the concentration of Potassium ions outside the cell increases
C
glycogen is depleted
D
muscle fibers cannot contract completely
7) ______ is a 'flapping' tremor caused by alternating activation of antagonistic reflex arcs
A
spastic paralysis
B
clonus
C
tetanus
D
treppe
8) _______ is the inhibition of an antagonistic muscle so the agonist can act unopposed
A
flaccid paralysis
B
reciprocal innervation
C
monosynaptic reflex
D
decussant extensor action
9) cardiac muscles are conductive because
A
the protein titin has elastic properties
B
thick fibers are cross-linked by C proteins
C
they contain sodium leak channels
D
intercalated discs contain numerous gap juncitons
10) in cardiac muscle, calcium ions are released from the sarcoplasmic reticulum by
A
calcium gated calcium channels
B
ligand gated calcium channels
C
mechanically linked calcium release channels
D
voltage gated calcium channels
11) as smooth muscle lacks troponin, the activation of myosin-actin cross bridges is mediated by
A
titin
B
tropomyosin
C
myoglobin
D
calmodulin
12) the pathway from the heart, through the lungs, and back to the heart is
A
pluck circulation
B
systemic circulation
C
cardiac circulation
D
pulmonary circulation
13) the _______valve prevents blood from flowing back to the left atrium from the left ventricle.
A
bicuspid or mitral
B
tricuspid or vitral
C
aortic semilunar
D
pulmonary semilunar
14) the amount of blood pumped by the ventricles with each heartbeat is the
A
blood pressure
B
stroke volume
C
cardiac output
D
end diastolic volume
15) systole refers to ______, while diastole refers to _____
A
relaxation, contraction
B
filling, emptying
C
opening, closing
D
contraction, relaxation
16) on average the ejection fraction of the left ventricle is about 60% of the _______
A
ventriculo-aortic volume
B
pre contraction volume
C
end diastolic volume
D
total cardiac volume
17) opening more slow Calcium Ion channels in the autorhythmic cells of the SA node would
A
decrease heart rate
B
increase heart rate
C
decrease contractility
D
increase contractility
18) the cardiac pacemaker cells known as HCN cells open in response to ____ and allow passage of ___
A
depolarization, calcium ions
B
hyperpolarization, chloride ions
C
hyperpolarization, sodium ions
D
resting potential, Potassium ions
19) Myocardial cells exhibit a plateau phase instead of quickly repolarizing. This is due to
A
outward pumping of sodium through the fast Sodium/ Potassium pump
B
inward diffusion of calcium ions
C
inward diffusion of sodium ions
D
inward diffusion of potassium through special delayed closure channels
20) The production and conduction of action potentials in the heart produces a recordable tracing of the electrical activity of the heart called a(n)
A
STRESS TEST
B
TRACE
C
EMG
D
EKG / ECG
*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?