Question :
51.Based the length-tension relationship,
a.stretching a skeletal muscle 30% longer than : 1417085
51.Based on the length-tension relationship,
a.stretching a skeletal muscle 30% longer than the lo results in a greater contraction
b.varying the amount of overlap of thick and thin filaments does not greatly affect contraction force as long as tension remains the same
c.more tension develops if a muscle is 30% shorter than its resting length
d.muscle tension remains the same as long as the muscle's length is not more than ?30% of the resting length.
e.a resting muscle that is shorter or longer than its lo will generate less tension at the onset of contraction.
52.Picking up a book at a constant speed requires that
a.muscle tension be equal to the book's weight
b.the muscle perform an eccentric contraction
c.the muscle perform an isometric contraction
d.the muscle perform a concentric contraction
e.both a and d occur
53.Muscle tension
a.is created when tension generated by sarcomeres is transmitted via the connective tissue and tendons to the bones
b.is the force exerted on a muscle by the weight of an object
c.is greater than the load during an isometric contraction
d.is all of the above
e.is none of the above
54.The origin of a muscle is its
a.main, thickest part
b.middle, thinner part
c.movable end of attachment
d.source of development in the fetus
e.stationary end of attachment
55.During an isotonic contraction,
a.sarcomeres do not shorten in the muscle
b.movement does not occur inside the muscle
c.the muscle does not change length
d.the muscle's tension does not overcome a load
e.the muscle's tension remains constant
56.During an isometric contraction, the muscle
a.maintains a constant tension
b.shortens
c.moves a body part
d.maintains a constant length
e.tension is greater than the load
57.With eccentric muscle contractions,
a.development of tension occurs at constant muscle length
b.muscles lengthen while contracting
c.muscles shorten while contracting
d.muscle length and tension vary throughout a range of motion
e.none of the above occur
58.Submaximal isometric contractions are important for
a.moving large objects
b.walking
c.maintaining posture
d.writing
e.both a and b
59.Muscles developing tension while lengthening are performing ____ contractions.
a.concentric
b.eccentric
c.isometric
d.fatiguing
e.oscillating
60.In a muscle fiber undergoing maximal tetanic stimulation, the velocity of shortening ____ as the load ____.
a.decreases; decreases
b.decreases; increases
c.increases; increases
d.remains constant; increases
e.remains constant; decreases
