Each muscle fiber is surrounded by a connective tissue called?
a. Fasiciculi.
b. Perimysium.
c. Endomysium.
d. Epimysium.
C 5
What is released from the sarcoplasmic reticulum into the myofibril, causing tension development in a muscle?
a. Calcium ions that bind to troponin.
b. Calci...
each muscle fiber is surrounded by a connective tissue called
what is released from the sarcoplasmic reticulum into the myofibril
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CSCS Prep
Each muscle fiber is surrounded by a connective tissue called?
a. Fasiciculi.
b. Perimysium.
c. Endomysium.
d. Epimysium. - Answer C 5
What is released from the sarcoplasmic reticulum into the myofibril, causing tension
development in a muscle?
a. Calcium ions that bind to troponin.
b. Calcium ions that bind to tropomyosin.
c. Sodium ions that bind to troponin.
d. Sodium ions that bind to tropomyosin. - Answer A 7
What type of muscular contraction occurs in the pectoralis major during the slow,
controlled, downward phase of a bench press?
a. Concentric.
b. Isometric.
c. Myocentric.
d. Eccentric. - Answer D 32
What is the thick structural protein inside the sarcomere?
a. Actin.
b. Myosin.
c. Sarcoplasm.
d. Sarcolemma. - Answer B 5
A muscle fiber that is small in diameter has a slow contraction speed, and a high
capillary density would be classified as?
a. Type I.
b. Type IIa.
c. Type IIb.
d. Type IIc. - Answer A 9
Through which of the following valves does blood flow after contraction of the right
atrium?
a. Aortic.
b. Pulmonary.
c. Mitral.
d. Tricupsid. - Answer D 12
,CSCS Prep
During a typical electrocardiogram, atrial depolarization is represented by?
a. P-wave.
b. QRS complex.
c. T-wave.
d. U-wave. - Answer A 14
While reading an ECG, electrical potential that depolarizes the ventricles is represented
by?
a. P-wave
b. QRS complex
c. T-wave
d. U-wave - Answer B 14
What blood vessel functions to exchange oxygen, fluid, nutrients, electrolytes,
hormones, and other substances between the blood and the interstitial fluid in the
various tissues of the body?
a. Arteries.
b. Capillaries.
c. Veins.
d. Venules. - Answer B 15
Where are normal rhythmic electrical impulses initiated in the heart?
a. Sinoatrial (SA) node.
b. Atrioventricular (AV) bundle.
c. Purkinje fibers.
d. Atrioventricular (AV) node. - Answer A 13
When performing a biceps curl, tension in the biceps brachii muscle increases. Which of
the following structures detects and responds to the tension by reflexively reducing
muscle activation?
a. Golgi tendon organ.
b. Muscle spindle.
c. Pacinian corpuscle.
d. Lamellar corpuscle. - Answer A 12
An athlete training for a marathon would benefit from having a high concentration of
which muscle fiber type?
a. Type I.
b. Type IIa.
c. Type IIb.
,CSCS Prep
d. Type III. - Answer A 9
A college football player decides to add 30 minutes of intense stationary cycling every
other day to his current resistance training program. Which of the following best
describes the effect the stationary cycling will have on his performance?
a. No effect on strength gains.
b. Strength gains enhanced.
c. Strength gains compromised.
d. Number of muscle fibers increased. - Answer C
Which of the following represents the correct transmission of the heart's electrical
impulse?
"a. AV node, AV bundle, SA node, Purkinje fibers.
b. SA node, AV node, AV bundle, Purkinje fibers.
c. SA node, Purkinje fiber, AV node, AV bundle.
d. AV node, AV bundle, Purkinje fibers, SA node. - Answer B 13
Which of the following represents a muscle of expiration?
a. Scalene.
b. External Intercostal.
c. Internal Intercostal.
d. Anterior Serratus. - Answer C 16
Identify the correct path in which inhaled air is distributed to the lungs.
a. Trachea, Bronchi, Bronchioles, Alveoli.
b. Trachea, Alveoli, Bronchi, Bronchioles.
c. Trachea, Bronchioles, Bronchi, Alveoli.
d. Trachea, Alveoli, Bronchioles, Bronchi. - Answer A 15
Heavy resistance exercise has what effect on cardiac output?
a. Increases rapidly.
b. Decreases.
c. No change.
d. Decreases rapidly. - Answer C 103
What is the value of a metabolic equivalent (MET)
a. 2.5 ml of oxygen per kilogram of body weight per minute.
b. 3.5 ml of carbon dioxide per kilogram of body weight per minute.
c. 3.5 ml of oxygen per kilogram of body weight per minute.
d. 2.5 ml of carbon dioxide per kilogram of body weight per minute. - Answer C 117
, CSCS Prep
Which of the following structures of a sarcomere shrinks in the pectoralis major muscle
during the concentric action of a bench press?
A. A-band.
B. M-line.
C. H-zone.
D. Z-line. - Answer C 6
Which of the following identifies the layer of connective tissue enveloping a bundle of
muscle fibers?
A. Endomysium.
B. Perimysium.
C. Epimysium.
D. Endomysium. - Answer B 4
A junior hockey player is performing a standing dumbbell curl exercise. Which of the
following muscles acts as an antagonist to the biceps brachii?
A. Triceps Brachii.
B. Brachialis.
C. Coracobrachialis.
D. Flexor Carpi Radialis. - Answer A 20
The amount of force produced by a muscle at any given time is directly related to which
of the following.
A. The number of myosin cross bridge heads that are attached to actin filaments.
B. The number of actin cross bridge heads that are attached to myosin filaments.
C. The strength of the attachment between the myosin cross bridge heads and the actin
filaments.
D. The strength of the attachment between the actin cross bridge heads and the myosin
filaments. - Answer A 6 - 7
When a motor unit is stimulated, all of its innervated muscle fibers fully contract due to...
A. the size principle.
B. the principle of selective recruitment.
C. the all-or-none law.
D. muscle tetanus. - Answer C 9
A high myoglobin content is a characteristic of which muscle fiber type?
A. Type I.
B. Type IIa.
C. Type IIx.
D. Type III. - Answer A 10
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