Factors Affect Tension Produced By Muscle Fiber

Question 1

What is the primary determinant of muscle fiber tension?

Answer 1

The number of cross-bridges formed between actin and myosin.

Question 2

True or False: Muscle fiber tension is independent of the muscle’s length.

Answer 2

False.

Question 3

Fill in the blank: The optimal length for muscle fiber tension is known as the ______ length.

Answer 3

resting.

Question 4

What role does the frequency of stimulation play in muscle tension?

Answer 4

Higher frequencies of stimulation can lead to increased muscle tension due to summation.

Question 5

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

Answer 5

B) Increased temperature.

Question 6

What effect does increased calcium ion concentration have on muscle contraction?

Answer 6

It enhances the interaction between actin and myosin, increasing tension.

Question 7

True or False: Muscle fatigue can decrease the tension produced by a muscle fiber.

Answer 7

True.

Question 8

What is the ‘length-tension relationship’ in muscle fibers?

Answer 8

It describes how the tension produced by a muscle fiber varies with its length.

Question 9

Which type of muscle fiber has a higher tension output, fast-twitch or slow-twitch?

Answer 9

Fast-twitch muscle fibers.

Question 10

Fill in the blank: The ______ period is the time before muscle tension begins to increase after stimulation.

Answer 10

latent.

Question 11

What is the effect of muscle temperature on tension production?

Answer 11

Increased temperature can enhance muscle tension production.

Question 12

True or False: The speed of muscle contraction affects the amount of tension produced.

Answer 12

True.

Question 13

What is the term for the maximum tension a muscle can produce?

Answer 13

Twitch tension.

Question 14

Multiple Choice: Which factor does NOT affect muscle fiber tension? A) Muscle hydration B) Muscle fiber type C) Oxygen availability D) Muscle color

Answer 14

D) Muscle color.

Question 15

What is the significance of the ‘all-or-nothing’ principle in muscle contraction?

Answer 15

Muscle fibers either contract fully or not at all in response to a stimulus.

Question 16

Fill in the blank: Muscle fibers produce more tension when they are ______ stimulated.

Answer 16

repeatedly.

Question 17

What is the role of ATP in muscle tension production?

Answer 17

ATP provides the energy required for muscle contraction and relaxation.

Question 18

True or False: Muscle tension is affected by the rate of energy production.

Answer 18

True.

Question 19

What is the relationship between load and muscle tension?

Answer 19

As load increases, the muscle tension produced also increases up to a point.

Question 20

Fill in the blank: Muscle fibers can be classified into ______ types based on their contraction speed.

Answer 20

two.

Question 21

What is the term for the phenomenon where increased stimulation frequency leads to sustained muscle contraction?

Answer 21

Tetanus.

Question 22

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

Answer 22

A) Depletion of glycogen.

Question 23

What is the role of myoglobin in muscle fibers?

Answer 23

Myoglobin stores oxygen, which is crucial for aerobic respiration in muscle fibers.

Question 24

True or False: The presence of lactic acid has no effect on muscle tension.

Answer 24

False.

Question 25

What is the main purpose of warm-up exercises before intense physical activity?

Answer 25

To increase muscle temperature and enhance tension production.