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Jugar Test
1. 
Contraction duration depends on each of these EXCEPT:
A.
Duration of neural stimulus
B.
Number of free Ca2+ ions in sarcoplasm
C.
Availability of ATP
D.
Level of sodium ions within the sarcoplasm
2. 
The tension of a single muscle fiber relies on each of these EXCEPT:
A.
Number of pivoting cross bridges
B.
Strength of titin strands
C.
The fiber's resting length at the time of stimulation
D.
The frequency of neural stimulation
3. 
A twitch consists of which phases?
A.
Latent period in which action potential moves through sarcolemma
B.
Contraction phase in which calcium ions bind and tension builds to peak
C.
Relaxation phase in which Ca2+ levels fall
D.
Recovery phase in which active sites are recovered and recharged
4. 
Number of pivoting cross bridges depends on...
5. 
Normal resting sarcomere length is...
A.
25-50% of optimal length
B.
50-78% of optimal length
C.
75-130% of optimal length
D.
80-120% of optimal length
6. 
Treppe is...
A.
A stair step increase in twitch tension
B.
A summation of twitches or repeated stimulations before the end of the relaxation phase
C.
Rapid stimulations without relaxation which reach maximum tension
D.
Stimulations in which muscle never even begins to relax but stays in one continuous contraction
7. 
Slowly increasing the size and number of motor units being stimulated is called
8. 
Isotonic contraction is
A.
The contraction in which a skeletal muscle changes length resulting in motion
B.
The contraction in which the skeletal muscle gains tension but cannot change length
9. 
The heavier the load, the...
A.
The longer it takes for shortening to begin
B.
The less the muscle will shorten
C.
Neither are correct
D.
Both are accurate
10. 
Which of these provides storage of excess adenosine triphosphate in resting muscle?
A.
creatine phosphate
B.
ATP
C.
ADP
D.
All answers are correct
11. 
Which produces ATP in peak muscular activity?
A.
Aerobic metabolism
B.
Anaerobic metabolism
12. 
All of these are results of muscle fatigue EXCEPT:
A.
Low pH
B.
Damage to sarcolemma and sarcoplasmic reticulum
C.
Buildup of pyruvic acid
D.
Depletion of metabolic reserves
13. 
The Cori Cycle is
14. 
Which of the three types of skeletal muscle fibers have few mitochondria and large glycogen reserves?
A.
intermediate fibers
B.
fast fibers
C.
slow fibers
D.
all answers are correct
15. 
Which of these is muscle hypertrophy?
A.
lack of muscle activity
B.
prolonged muscular activity (most aerobic)
C.
prolonged anaerobic activities using fast fibers
D.
muscle growth from heavy training