Question 1

Match the following:
A) Fast (oxidative or glycolytic), fatigable fibers
B) Slow (oxidative), fatigue-resistant fibers
-Have very fast-acting myosin ATPases and depend upon anaerobic metabolism during contraction.

Accepted Answer

Fast (oxidative or glycolytic), fatigable fibers have very fast-acting myosin ATPases and depend upon anaerobic metabolism during contraction. Slow (oxidative), fatigue-resistant fibers have slower-acting myosin ATPases and rely on aerobic metabolism for energy during contraction. Option C is a duplicate of option B.

Question 2

Match the following:
A) Fast (oxidative or glycolytic), fatigable fibers
B) Slow (oxidative), fatigue-resistant fibers
-A relatively high percentage are found in successful marathon runners.

Accepted Answer

Slow (oxidative), fatigue-resistant fibers are found in successful marathon runners who rely on endurance and sustained effort rather than quick bursts of energy.

Answer: B 
 Fast (oxidative or glycolytic), fatigable fibers are not typically found in successful marathon runners because they are designed for quick bursts of energy, rather than sustained effort over long distances.

Question 3

Match the following:
A) Fast (oxidative or glycolytic), fatigable fibers
B) Slow (oxidative), fatigue-resistant fibers
-Depends on oxygen delivery and aerobic mechanisms.

Accepted Answer

Slow (oxidative), fatigue-resistant fibers depend on oxygen delivery and aerobic mechanisms for energy production.

Answer: B and C
 Fast (oxidative or glycolytic), fatigable fibers can utilize both aerobic and anaerobic mechanisms for energy production but still depend on oxygen delivery for optimal performance.

Question 4

Match the following:
A) Tetanus
B) Muscle tone
C) Maximal stimulus
D) Wave summation
E) Multiple motor unit summation
-The stimulus above which no stronger contraction can be elicited, because all motor units are firing in the muscle.

Accepted Answer

The definition matches the term "Maximal stimulus," which refers to the strongest stimulus that will cause all motor units in a muscle to contract.

Answer: A 
 While the definition does not perfectly match any of the choices, "Tetanus" is the closest match. Tetanus refers to a sustained contraction of a muscle due to repetitive stimuli, and if the stimuli are strong enough, all motor units in the muscle will fire and reach their maximum contraction, resulting in a plateau of muscle tension.

Note: While "muscle tone" is a term related to the slight tension present in a muscle at rest, it does not fit the definition provided. "Wave summation" and "multiple motor unit summation" both refer to mechanisms by which increased stimulation leads to stronger muscle contractions, but they do not necessarily imply that all available motor units are firing.

Question 5

Match the following:
A) Tetanus
B) Muscle tone
C) Maximal stimulus
D) Wave summation
E) Multiple motor unit summation
-Continued sustained smooth contraction due to rapid stimulation.

Accepted Answer

Continued sustained smooth contraction due to rapid stimulation is known as tetanus.

Question 6

Figure 9.1
Using Figure 9.1, match the following:
-Connective tissue covering the exterior of a muscle organ.

Accepted Answer

The answer of  
Figure 9.1
Using Figure 9.1, match the...

Question 7

Match the following:
A) Tetanus
B) Muscle tone
C) Maximal stimulus
D) Wave summation
E) Multiple motor unit summation
-The situation in which contractions become stronger due to stimulation before complete relaxation occurs.

Accepted Answer

Wave summation refers to the phenomenon in which repeated stimuli before the muscle returns to its resting state result in stronger and more prolonged contractions. This is also known as temporal summation.

Answer: A
 Tetanus is a sustained contraction that occurs when a muscle is stimulated rapidly and repeatedly, without allowing it to relax completely. This results in a smooth and sustained contraction.

Answer: D
 Muscle tone refers to the constant and slight tension that is present in muscles, even at rest. This tension helps to maintain posture and skeletal stability.

Answer: E
 Multiple motor unit summation refers to the process by which the strength of a muscle contraction is increased by recruiting more motor units. This is achieved by increasing the frequency of stimulation, which results in the recruitment of more motor units.

Answer: B does not match any of the given explanations.

Question 8

Figure 9.2
Using Figure 9.2, match the following:
-I band.

Accepted Answer

The answer of  
Figure 9.2
Using Figure 9.2, match the...

Question 9

Match the following:
A) Fast (oxidative or glycolytic), fatigable fibers
B) Slow (oxidative), fatigue-resistant fibers
-Abundant in muscles used to maintain posture.

Accepted Answer

Slow oxidative, fatigue-resistant fibers are abundant in muscles used to maintain posture, as they are able to sustain contraction for a prolonged period of time without fatiguing easily. Fast fibers (B and C) are better suited for quick, powerful movements and do not have as much endurance as slow fibers.

Question 10

Figure 9.1
Using Figure 9.1, match the following:
-Bundle of muscle cells surrounded by a perimysium

Accepted Answer

The answer of  
Figure 9.1
Using Figure 9.1, match the...

Question 11

Figure 9.2
Using Figure 9.2, match the following:
-A band.

Accepted Answer

The answer of  
Figure 9.2
Using Figure 9.2, match the...

Question 12

Figure 9.1
Using Figure 9.1, match the following:
-Connective tissue surrounding muscle fiber bundles

Accepted Answer

The answer of  
Figure 9.1
Using Figure 9.1, match the...

Question 13

Figure 9.2
Using Figure 9.2, match the following:
-H zone.

Accepted Answer

The H zone is located in the center of the A band of a sarcomere in muscle fibers and is visible as a lighter stripe under a microscope. It represents the region that lacks thin filaments (actin) and contains only thick filaments (myosin) when the muscle is in a relaxed state. As the muscle contracts, the H zone shortens because the thin filaments slide past the thick filaments, leading to sarcomere shortening and muscle contraction.

Question 14

Match the following:
A) Fast (oxidative or glycolytic), fatigable fibers
B) Slow (oxidative), fatigue-resistant fibers
-Contain abundant amounts of glycogen.

Accepted Answer

The answer of Match the following:
A) Fast (oxidative or glycolytic),...

Question 15

Figure 9.1
Using Figure 9.1, match the following:
-Connective tissue sheath surrounding individual muscle fibers

Accepted Answer

The connective tissue sheath surrounding individual muscle fibers is known as the endomysium. This sheath provides structural support and protection to the muscle fibers.

Question 16

Match the following:
A) Fast (oxidative or glycolytic), fatigable fibers
B) Slow (oxidative), fatigue-resistant fibers
-Red fibers, the smallest of the fiber types.

Accepted Answer

Red fibers are also known as type I fibers and are slow (oxidative) and fatigue-resistant. They are the smallest of the fiber types and rely on aerobic metabolism for energy.

Answer: B and C
 Fast (oxidative or glycolytic), fatigable fibers are also known as type II fibers. They come in two subtypes, type IIa (fast oxidative) and type IIb (fast glycolytic). Type II fibers are larger in size compared to type I fibers and fatigue faster.

Question 17

Match the following:
A) Tetanus
B) Muscle tone
C) Maximal stimulus
D) Wave summation
E) Multiple motor unit summation
-Determined by alternating motor units of a muscle organ even when the muscle is at rest.

Accepted Answer

Muscle tone is the constant low-level contraction of muscle fibers within a muscle, even when the muscle is at rest, due to the alternating activation of different motor units.

Question 18

Figure 9.1
Using Figure 9.1, match the following:
-Individual muscle fiber.

Accepted Answer

The answer of  
Figure 9.1
Using Figure 9.1, match the...

Question 19

Figure 9.2
Using Figure 9.2, match the following:
-Z disc.

Accepted Answer

The answer of  
Figure 9.2
Using Figure 9.2, match the...

Question 20

Figure 9.2
Using Figure 9.2, match the following:
-M line.

Accepted Answer

The answer of  
Figure 9.2
Using Figure 9.2, match the...

Quiz 9: Muscles and Muscle Tissue

Match the following: A) Fast (oxidative or glycolytic), fatigable fibers B) Slow (oxidative), fatigue-resistant fibers -Have very fast-acting myosin ATPases and depend upon anaerobic metabolism during contraction.

Match the following: A) Fast (oxidative or glycolytic), fatigable fibers B) Slow (oxidative), fatigue-resistant fibers -A relatively high percentage are found in successful marathon runners.

Match the following: A) Fast (oxidative or glycolytic), fatigable fibers B) Slow (oxidative), fatigue-resistant fibers -Depends on oxygen delivery and aerobic mechanisms.

Match the following: A) Tetanus B) Muscle tone C) Maximal stimulus D) Wave summation E) Multiple motor unit summation -The stimulus above which no stronger contraction can be elicited, because all motor units are firing in the muscle.

Match the following: A) Tetanus B) Muscle tone C) Maximal stimulus D) Wave summation E) Multiple motor unit summation -Continued sustained smooth contraction due to rapid stimulation.

Figure 9.1 Using Figure 9.1, match the following: -Connective tissue covering the exterior of a muscle organ.

Match the following: A) Tetanus B) Muscle tone C) Maximal stimulus D) Wave summation E) Multiple motor unit summation -The situation in which contractions become stronger due to stimulation before complete relaxation occurs.

Figure 9.2 Using Figure 9.2, match the following: -I band.

Match the following: A) Fast (oxidative or glycolytic), fatigable fibers B) Slow (oxidative), fatigue-resistant fibers -Abundant in muscles used to maintain posture.

Figure 9.1 Using Figure 9.1, match the following: -Bundle of muscle cells surrounded by a perimysium

Figure 9.2 Using Figure 9.2, match the following: -A band.

Figure 9.1 Using Figure 9.1, match the following: -Connective tissue surrounding muscle fiber bundles

Figure 9.2 Using Figure 9.2, match the following: -H zone.

Match the following: A) Fast (oxidative or glycolytic), fatigable fibers B) Slow (oxidative), fatigue-resistant fibers -Contain abundant amounts of glycogen.

Figure 9.1 Using Figure 9.1, match the following: -Connective tissue sheath surrounding individual muscle fibers

Match the following: A) Fast (oxidative or glycolytic), fatigable fibers B) Slow (oxidative), fatigue-resistant fibers -Red fibers, the smallest of the fiber types.

Match the following: A) Tetanus B) Muscle tone C) Maximal stimulus D) Wave summation E) Multiple motor unit summation -Determined by alternating motor units of a muscle organ even when the muscle is at rest.

Figure 9.1 Using Figure 9.1, match the following: -Individual muscle fiber.

Figure 9.2 Using Figure 9.2, match the following: -Z disc.

Figure 9.2 Using Figure 9.2, match the following: -M line.