PhysioEx Exercise 2 Activity 6 Exam Questions and Answers Already Passed
During an isometric contraction... - Answers The skeletal muscle is generating force, but it remains at a
fixed length.
The force that results from muscles being stretched is... - Answers Passive force
Active force... - Answers Is determined by the amount of myosin bound to actin.
When you generate the isometric length-tension curve, which of the following forces will not be
indicated on your screen? - Answers Tetanic force
Passive force in skeletal muscle is largely caused by... - Answers The protein titin
As the resting length of the muscle is changed, what will happen to the amount of total force the muscle
generates during the stimulated twitch? - Answers An increase in muscle length will increase total force.
Note the dip in total force at a muscle length of 90 mm as compared to the total force at a muscle length
of 80 and 100 mm. Why does this occur? - Answers At this muscle length, active force has decreased in
value and passive force has not yet increased to a significant value.
When a skeletal muscle is stimulated and generates force but remains at a fixed length... - Answers The
muscle is contracting isometrically.
Which protein is mostly responsible for the development of passive force in a muscle? - Answers Titin
In skeletal muscle, active force stimulated through a range of muscle lengths... - Answers Will utilize ATP
hydrolysis to drive the cross-bridge cycle.
Which of the following is not depicted in a typical skeletal muscle isometric length-tension curve? -
Answers Time
Maximal active tension will be produced in a skeletal muscle fiber when... - Answers The fiber is at its
resting length.
What happens to the amount of total force the muscle generates during the stimulated twitch? How
well did the results compare with your prediction? - Answers My prediction was correct, when there is
an increase to muscle length, the total force increases. When there is a decrease to muscle length, there
is a decrease in total force.
What is the key variable in an isometric contraction of a skeletal muscle? - Answers The length-tension
relationship.
Based on the unique arrangement of myosin and actin in skeletal muscle sarcomeres, explain why active
force varies with changes in the muscle's resting length. - Answers When the skeletal muscles resting
length increases, there is more time for myosin bridges to return to their starting position.
During an isometric contraction... - Answers The skeletal muscle is generating force, but it remains at a
fixed length.
The force that results from muscles being stretched is... - Answers Passive force
Active force... - Answers Is determined by the amount of myosin bound to actin.
When you generate the isometric length-tension curve, which of the following forces will not be
indicated on your screen? - Answers Tetanic force
Passive force in skeletal muscle is largely caused by... - Answers The protein titin
As the resting length of the muscle is changed, what will happen to the amount of total force the muscle
generates during the stimulated twitch? - Answers An increase in muscle length will increase total force.
Note the dip in total force at a muscle length of 90 mm as compared to the total force at a muscle length
of 80 and 100 mm. Why does this occur? - Answers At this muscle length, active force has decreased in
value and passive force has not yet increased to a significant value.
When a skeletal muscle is stimulated and generates force but remains at a fixed length... - Answers The
muscle is contracting isometrically.
Which protein is mostly responsible for the development of passive force in a muscle? - Answers Titin
In skeletal muscle, active force stimulated through a range of muscle lengths... - Answers Will utilize ATP
hydrolysis to drive the cross-bridge cycle.
Which of the following is not depicted in a typical skeletal muscle isometric length-tension curve? -
Answers Time
Maximal active tension will be produced in a skeletal muscle fiber when... - Answers The fiber is at its
resting length.
What happens to the amount of total force the muscle generates during the stimulated twitch? How
well did the results compare with your prediction? - Answers My prediction was correct, when there is
an increase to muscle length, the total force increases. When there is a decrease to muscle length, there
is a decrease in total force.
What is the key variable in an isometric contraction of a skeletal muscle? - Answers The length-tension
relationship.
Based on the unique arrangement of myosin and actin in skeletal muscle sarcomeres, explain why active
force varies with changes in the muscle's resting length. - Answers When the skeletal muscles resting
length increases, there is more time for myosin bridges to return to their starting position.
