PHYS PhysioEx Exercise 2

Which of the following occurs during isotonic concentric contraction?

Which of the following occurs during the latent period of isotonic concentric contraction?

The speed of muscle contraction is called the _______.

For a weight to be lifted, which of the following must occur?

d to be lifted increases in weight, the latent period _______.

The shortest duration of muscle contraction occurs with _______.

The velocity of shortening _______.

As the weight increased, the distance the weight was lifted _______.

Which of the following occurs if the load attempted is equal to or greater than the force generated by a muscle?

The resting length of the muscle _______.

The graph of the length-tension relationship illustrates _______.

Which of the following is generated when cross-bridges form between actin and myosin?

Which of the following describes the relationship between length and tension?

Why does the active force of skeletal muscle change with the muscle's resting length?

Which starting length of the muscle provided the maximum total force?

At which muscle length was the passive force the greatest?

Which of the following is matched correctly?

Which of the following situations delay the development of muscle fatigue the longest?

Which of the following molecules is NOT thought to accumulate during muscle fatigue?

During muscle fatigue, the ____________ decreases.

In this activity, why did the muscle force decrease over time?

Which of the following describes how increasing the duration of the rest period affected muscle tension?

What might be occurring on a molecular level during the rest periods?

Which of the following does NOT describe tetanus?

Which of the following is true of the maximum stimulus frequency?

Muscle twitches overlap with _______.

Treppe is the phenomenon that results in _______.

When the frequency of stimulation of a muscle is great enough, _______.

When wave summation occurs, _______.

Why does wave summation occur?

Which of the following would result in fused or unfused tetanus compared to a single muscle twitch?

To transition from unfused tetanus to fused tetanus, _______.

Which of the following describes the relationship between stimulus frequency and muscle tension?

At what stimulus frequency was maximal tetanic tension developed?

Which of the following produced an increase in stimulus intensity?

Which of the following produced an increase in stimulus frequency?

Which of the following does NOT describe treppe?

Which of the following is proportional to the amount of tension produced by a skeletal muscle?

NO force is generated during which of the following?

What is the minimum voltage needed to generate active force in the skeletal muscle?

A motor unit is defined as _______.

Which of the following terms are NOT used interchangeably?

Which of the following is NOT a phase of a muscle twitch?

Where does the acetylcholine that stimulates muscle contraction bind?

When acetylcholine binds to its receptors, it results in __________.

In the lab, a researcher finds that the threshold stimulus to induce an action potential in a muscle fiber's sarcolemma was 3.0 volts. Which of the following would result in muscle tension?

Increasing the applied voltage in the simulation corresponds to which in vivo event?

As the stimulus voltage increased, the resulting muscle tension _______.

Which of the following occurs during the contraction phase?

Which of the following occurs during the latent period of muscle contraction?

As the stimulus voltage was increased in this activity, which of the following occurred?

Which of the following describes the relaxation phase?

Which of the following can trigger a muscle twitch?