Factors Affect Tension Produced By Muscle Fiber Flashcards
What is the primary determinant of muscle fiber tension?
The number of cross-bridges formed between actin and myosin.
True or False: Muscle fiber tension is independent of the muscle’s length.
False.
Fill in the blank: The optimal length for muscle fiber tension is known as the ______ length.
resting.
What role does the frequency of stimulation play in muscle tension?
Higher frequencies of stimulation can lead to increased muscle tension due to summation.
Multiple Choice: Which of the following factors can increase muscle fiber tension? A) Increased load B) Increased temperature C) Decreased calcium availability D) All of the above
B) Increased temperature.
What effect does increased calcium ion concentration have on muscle contraction?
It enhances the interaction between actin and myosin, increasing tension.
True or False: Muscle fatigue can decrease the tension produced by a muscle fiber.
True.
What is the ‘length-tension relationship’ in muscle fibers?
It describes how the tension produced by a muscle fiber varies with its length.
Which type of muscle fiber has a higher tension output, fast-twitch or slow-twitch?
Fast-twitch muscle fibers.
Fill in the blank: The ______ period is the time before muscle tension begins to increase after stimulation.
latent.
What is the effect of muscle temperature on tension production?
Increased temperature can enhance muscle tension production.
True or False: The speed of muscle contraction affects the amount of tension produced.
True.
What is the term for the maximum tension a muscle can produce?
Twitch tension.
Multiple Choice: Which factor does NOT affect muscle fiber tension? A) Muscle hydration B) Muscle fiber type C) Oxygen availability D) Muscle color
D) Muscle color.
What is the significance of the ‘all-or-nothing’ principle in muscle contraction?
Muscle fibers either contract fully or not at all in response to a stimulus.
Fill in the blank: Muscle fibers produce more tension when they are ______ stimulated.
repeatedly.
What is the role of ATP in muscle tension production?
ATP provides the energy required for muscle contraction and relaxation.
True or False: Muscle tension is affected by the rate of energy production.
True.
What is the relationship between load and muscle tension?
As load increases, the muscle tension produced also increases up to a point.
Fill in the blank: Muscle fibers can be classified into ______ types based on their contraction speed.
two.
What is the term for the phenomenon where increased stimulation frequency leads to sustained muscle contraction?
Tetanus.
Multiple Choice: Which of the following is a factor that can lead to muscle fatigue? A) Depletion of glycogen B) Increased calcium concentration C) Low temperature D) High oxygen availability
A) Depletion of glycogen.
What is the role of myoglobin in muscle fibers?
Myoglobin stores oxygen, which is crucial for aerobic respiration in muscle fibers.
True or False: The presence of lactic acid has no effect on muscle tension.
False.
What is the main purpose of warm-up exercises before intense physical activity?
To increase muscle temperature and enhance tension production.
