Muscle Fibres

Question 1

What are the three types of muscle fibers?

Answer 1

Type I, Type IIa, and Type IIb.

Question 2

Which muscle fiber type is known for endurance activities?

Answer 2

Type I fibers.

Question 3

True or False: Type IIb fibers are primarily used for long-distance running.

Answer 3

False.

Question 4

Fill in the blank: Type IIa fibers are also known as ______ fibers.

Answer 4

fast-twitch oxidative.

Question 5

What is the primary energy source for Type I fibers?

Answer 5

Aerobic metabolism.

Question 6

Which muscle fiber type would be most beneficial for a sprinter?

Answer 6

Type IIb fibers.

Question 7

True or False: Type IIa fibers can be trained for both strength and endurance.

Answer 7

True.

Question 8

What distinguishes Type IIb fibers from Type IIa fibers?

Answer 8

Type IIb fibers generate more power but fatigue faster.

Question 9

Short Answer: Name a sport that predominantly uses Type I fibers.

Answer 9

Marathon running.

Question 10

Multiple Choice: Which muscle fiber type is most efficient at using oxygen?

Answer 10

A) Type I

Question 11

Fill in the blank: Type IIb fibers are best suited for ______ activities.

Answer 11

explosive.

Question 12

Short Answer: What type of training can enhance Type IIa fiber performance?

Answer 12

Interval training.

Question 13

Which muscle fiber type is associated with high-intensity, short-duration activities?

Answer 13

Type IIb fibers.

Question 14

True or False: All athletes possess the same proportion of muscle fiber types.

Answer 14

False.

Question 15

Multiple Choice: What type of muscle fiber would a weightlifter rely on?

Answer 15

B) Type IIb

Question 16

Short Answer: How does aging affect muscle fiber composition?

Answer 16

Aging can lead to a decrease in Type II fibers.

Question 17

Fill in the blank: Type I fibers are also known as ______ fibers.

Answer 17

slow-twitch.

Question 18

What is the primary characteristic of Type I muscle fibers?

Answer 18

They have a high resistance to fatigue.

Question 19

True or False: Type IIa fibers are faster than Type I fibers.

Answer 19

True.

Question 20

Multiple Choice: Which muscle fiber type is least likely to be utilized in a 100-meter dash?

Answer 20

C) Type I

Question 21

Short Answer: Name a factor that influences the proportion of muscle fiber types in an individual.

Answer 21

Genetics.

Question 22

What type of muscle fiber primarily relies on anaerobic metabolism?

Answer 22

Type IIb fibers.

Question 23

Fill in the blank: Athletes in endurance sports typically have a higher proportion of ______ fibers.

Answer 23

Type I.

Question 24

True or False: Muscle fibers cannot change types with training.

Answer 24

False.

Question 25

Multiple Choice: Which muscle fiber type is most efficient for sustained activities?

Answer 25

A) Type I

Question 26

Short Answer: What type of muscle fiber is predominantly used in aerobic exercises?

Answer 26

Type I fibers.

Question 27

Fill in the blank: Type IIa fibers are a hybrid of Type I and Type IIb, providing both ______ and ______.

Answer 27

strength; endurance.

Question 28

What is a common training method to improve Type IIb fiber performance?

Answer 28

Strength training.

Question 29

True or False: All muscle fibers are recruited during every type of physical activity.

Answer 29

False.

Question 30

Multiple Choice: Which fiber type is primarily responsible for quick bursts of speed?

Answer 30

B) Type IIb

Question 31

Short Answer: How do muscle fiber types affect athletic performance?

Answer 31

Different fiber types provide varying strengths for endurance or power activities.

Question 32

Fill in the blank: The recruitment of muscle fibers depends on the ______ of the activity.

Answer 32

intensity.

Question 33

What is the role of myoglobin in Type I muscle fibers?

Answer 33

It helps store oxygen.

Question 34

True or False: Type IIa fibers are more fatigue-resistant than Type IIb fibers.

Answer 34

True.

Question 35

Multiple Choice: Which fiber type would be advantageous for a long-distance cyclist?

Answer 35

A) Type I

Question 36

Short Answer: What adaptations occur in Type I fibers with endurance training?

Answer 36

Increased capillary density and mitochondrial content.