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