Muscle Histology (MSQ DRILL 202)

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Questions and Answers

1.

Which of the following invests skeletal muscle?
- A.
  
  Epimysium
- B.
  
  Endomysium
- C.
  
  Perimysium
Correct Answer
B. Endomysium
2.

What is endomysium made up of?
- A.
  
  Fibrous connective tissue
- B.
  
  Fibrocartilaginous connective tissue
- C.
  
  Hyaluronic acid
Correct Answer
A. Fibrous connective tissue
3.

Endomysium invests skeletal muscle. Which layers fills the spaces between muscle fibers?
- A.
  
  Epimysium
- B.
  
  Endomysium
- C.
  
  Perimysium
Correct Answer
B. Endomysium

Explanation
To invest: to surround, to inclose

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4.

Groups of muscles fibers are termed:
- A.
  
  Myofibrills
- B.
  
  Fascicles
- C.
  
  Corpuscles
Correct Answer
B. Fascicles
5.

The connective tissue capsule that separates or surrounds fascicles is known as the:
- A.
  
  Epimysium
- B.
  
  Perimysium
- C.
  
  Endomysium
Correct Answer
B. Perimysium
6.

The epimysium surrounds an entire muscle. It is made up of a sheath which contains which three fibers?
- A.
  
  Cartillagenous
- B.
  
  Elastic
- C.
  
  Collagenous
- D.
  
  Reticular
Correct Answer(s)
B. Elastic
C. Collagenous
D. Reticular
7.

Do tendons intermingle with the three layers found in skeletal muscles?
- A.
  
  Yes
- B.
  
  No
Correct Answer
A. Yes
8.

The bundles in the perimysium run in opposite directions. True or false?
- A.
  
  True, they run in opposite directions
- B.
  
  False, they run in the same direction
Correct Answer
B. False, they run in the same direction
9.

Muscles are surrounded by deep fascia. What is this deep fascia composed of?
- A.
  
  Densely packed collagen bundles and fibrous cartillage
- B.
  
  Densely packed elastic bundles and a fibrous capsule
- C.
  
  Densely packed collagen fibers and elastic fibers
- D.
  
  Loosely packed collagen fibers and elastic fibers
- E.
  
  Loosely packed collagen and a fibrous capsule
Correct Answer
C. Densely packed collagen fibers and elastic fibers
10.

What does the area of the deep fascia that is adjacent to a muscle contain?
- A.
  
  A high concentration of synovial fluid
- B.
  
  A low concentration of synovial fluid
- C.
  
  A high concentration of hyaluronic acid
- D.
  
  A low concentration of hyaluronic acid
Correct Answer
C. A high concentration of hyaluronic acid
11.

Which of the following secretes the high concentration of hyaluronic acid that is found in the area between the deep fascia and the muscle?
- A.
  
  Epimysium
- B.
  
  Perimysium
- C.
  
  Endomysium
Correct Answer
A. Epimysium
12.

Which of the following muscles has a contractile behavior of: slow twitch?
- A.
  
  Oxidative or type 1
- B.
  
  Oxidative glycolytic or type 2A
- C.
  
  Glycolytic or type 2B
Correct Answer
A. Oxidative or type 1
13.

If you stained a slow twitch or oxidative muscle fiber what enzyme would you find?
- A.
  
  Aspartate dehydrogenase
- B.
  
  Glutamate synthase
- C.
  
  NADH dehydrogenase
- D.
  
  NADH transferase
- E.
  
  Formaldehyde dehydrogenase
Correct Answer
D. NADH transferase
14.

So, the presence of NADH transferase indicates oxidative capacity?
- A.
  
  Yes
- B.
  
  No
Correct Answer
A. Yes
15.

Are type 2A and 2B fibers slow twich or fast twitch?
- A.
  
  Fast twitch
- B.
  
  Slow twitch
Correct Answer
A. Fast twitch
16.

Between type 2A and type 2B which one is glycolytic only?
- A.
  
  Type 2A
- B.
  
  Type 2B
Correct Answer
B. Type 2B
17.

Type 2A is therefore both glycolytic and oxidative. Is it fatigue resistant or fatigue sensitive?
- A.
  
  Fatigue resistant
- B.
  
  Fatigue sensitive
Correct Answer
A. Fatigue resistant
18.

Each muscle has a mixture of the different types of muscle fibers. True or false?
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
19.

Which type of muscle fibers are small and make up the neuromuscular spindle. These fibers are microscopic?
- A.
  
  Intrafusal fibers
- B.
  
  Extrafusal fibers
Correct Answer
A. Intrafusal fibers
20.

So, all of the ordinary muscle fibers outside of the spindle are known as intrafusal muscle fibers. True or false?
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
They are known as extrafusal. Intrafusal fibers are microscopic and make up the neuromuscular spindle.

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21.

The large alpha myelinated motor fibers innervate the:
- A.
  
  Intrafusal muscle fibers
- B.
  
  Extrafusal muscle fibers
Correct Answer
B. Extrafusal muscle fibers
22.

Where do the large alpha motor neurons that innervate the extrafusal fibers come from?
- A.
  
  Dorsal horn cells
- B.
  
  Anterolateral horn cell
- C.
  
  Anterior horn cells
Correct Answer
C. Anterior horn cells
23.

What is responsible for the MOTOR innervation of the intrafusal muscle fibers?
- A.
  
  Small anterior horn cells
- B.
  
  Alpha efferent neurons
- C.
  
  Gamma afferents
- D.
  
  Gamme efferents
- E.
  
  Alpha afferent neurons
Correct Answer
D. Gamme efferents
24.

The muscle spindle has sensory receptor innervation that measures the tension state of:
- A.
  
  Intrafusal muscle fibers only
- B.
  
  Extrafusal muscle fibers only
- C.
  
  Both intrafusal and extrafusal fibers
Correct Answer
C. Both intrafusal and extrafusal fibers
25.

So, the intrafusal fibers directly or indirectly measure the tension in the extrafusal fibers?
- A.
  
  Directly
- B.
  
  Indirectly
Correct Answer
B. Indirectly
26.

Does the intrafusal muscle fiber also measure the tension applied by muscle contraction on the tendon?
- A.
  
  Yes, the intrafusal fibers measure tension in the extrafusal fibers and the tendon.
- B.
  
  No, the intrafusal fibers do not measure the tension applied by the muscle contraction on the tendon.
Correct Answer
B. No, the intrafusal fibers do not measure the tension applied by the muscle contraction on the tendon.
27.

Therefore, what is sensitive to the tension applied by muscle contraction on the tendon?
- A.
  
  Golgi tendon organ
- B.
  
  Gamma efferents
- C.
  
  Type 1A sensory fiber
Correct Answer
A. Golgi tendon organ
28.

The golgi tendon organs provide information on the state of the tension in the tendons to the CNS or PNS?
- A.
  
  CNS
- B.
  
  PNS
Correct Answer
A. CNS
29.

Since the golgi tendon organs give feedback to the CNS, they are major determinants of organized coordinate muscle control and __________ .
- A.
  
  Movement
- B.
  
  Pain and temperature sensation
- C.
  
  Vibratory sense
- D.
  
  Propioception
Correct Answer
D. Propioception

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Current Version
Jan 11, 2013

Quiz Edited by
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Apr 19, 2010

Quiz Created by

Muscle Histology (Msq Drill 202)

Which of the following invests skeletal muscle?

What is endomysium made up of?

Endomysium invests skeletal muscle. Which layers fills the spaces between muscle fibers?

Groups of muscles fibers are termed:

The connective tissue capsule that separates or surrounds fascicles is known as the:

The epimysium surrounds an entire muscle. It is made up of a sheath which contains which three fibers?

Do tendons intermingle with the three layers found in skeletal muscles?

The bundles in the perimysium run in opposite directions. True or false?

Muscles are surrounded by deep fascia. What is this deep fascia composed of?

What does the area of the deep fascia that is adjacent to a muscle contain?

Which of the following secretes the high concentration of hyaluronic acid that is found in the area between the deep fascia and the muscle?

Which of the following muscles has a contractile behavior of: slow twitch?

If you stained a slow twitch or oxidative muscle fiber what enzyme would you find?

So, the presence of NADH transferase indicates oxidative capacity?

Are type 2A and 2B fibers slow twich or fast twitch?

Between type 2A and type 2B which one is glycolytic only?

Type 2A is therefore both glycolytic and oxidative. Is it fatigue resistant or fatigue sensitive?

Each muscle has a mixture of the different types of muscle fibers. True or false?

Which type of muscle fibers are small and make up the neuromuscular spindle. These fibers are microscopic?

So, all of the ordinary muscle fibers outside of the spindle are known as intrafusal muscle fibers. True or false?

The large alpha myelinated motor fibers innervate the:

Where do the large alpha motor neurons that innervate the extrafusal fibers come from?

What is responsible for the MOTOR innervation of the intrafusal muscle fibers?

The muscle spindle has sensory receptor innervation that measures the tension state of:

So, the intrafusal fibers directly or indirectly measure the tension in the extrafusal fibers?

Does the intrafusal muscle fiber also measure the tension applied by muscle contraction on the tendon?

Therefore, what is sensitive to the tension applied by muscle contraction on the tendon?

The golgi tendon organs provide information on the state of the tension in the tendons to the CNS or PNS?

Since the golgi tendon organs give feedback to the CNS, they are major determinants of organized coordinate muscle control and __________ .