$$\text{Tension} = \text{Cross-sectional area} \times 50\ \text{lb/in}^2$$

Question 1

Which connective tissue layer surrounds each individual muscle fiber within a skeletal muscle?

Accepted Answer

Endomysium

Question 2

A muscle that forms an angle with its tendon and contains more myofibrils than a parallel muscle is classified as which type?

Accepted Answer

Pennate

Question 3

If a muscle’s fascicles are arranged parallel to the long axis of the muscle, which of the following is true about its function?

Accepted Answer

It contracts over a greater distance and moves loads quickly.

Question 4

Which muscle arrangement allows for the greatest range of motion but the least tension?

Accepted Answer

Parallel

Question 5

In a second-class lever, where is the load positioned relative to the fulcrum and applied force?

Accepted Answer

Between the fulcrum and applied force

Question 6

Which of the following best describes the function of a first-class lever in the human body?

Accepted Answer

Balances force and load

Question 7

A muscle that opens and closes to guard entrances of the body is classified as which type?

Accepted Answer

Circular

Question 8

Which muscle arrangement is most likely to generate the greatest tension per cross-sectional area?

Accepted Answer

Pennate

Question 9

If a muscle is named 'biceps femoris,' what does the prefix 'bi-' indicate?

Accepted Answer

It has two origins or heads

Question 10

Which term describes a muscle that assists a larger agonist and helps stabilize its origin?

Accepted Answer

Synergist

Question 11

During a leg extension exercise, which muscle acts as the agonist?

Accepted Answer

Quadriceps

Question 12

Which of the following is true about the origin and insertion of a muscle?

Accepted Answer

The origin is usually proximal to the insertion

Question 13

A muscle named 'rectus abdominis' is named based on which characteristic?

Accepted Answer

Location and fascicle organization

Question 14

Which of the following muscles is an example of a multipennate muscle?

Accepted Answer

Deltoid

Question 15

If a muscle is described as 'externus,' what does this indicate about its position?

Accepted Answer

It is visible at the body surface

Question 16

Which of the following equations best represents the relationship between muscle cross-sectional area and tension produced?

Accepted Answer

$$	ext{Tension} = 	ext{Cross-sectional area} 	imes 50\ 	ext{lb/in}^2$$

Question 17

Which lever class is most common in the human body and maximizes speed and distance traveled?

Accepted Answer

Third-class lever

Question 18

A muscle named 'flexor digitorum superficialis' is named based on which characteristics?

Accepted Answer

Action and depth

Question 19

Which muscle type would be most effective for closing the mouth tightly?

Accepted Answer

Circular (Orbicularis oris)

Question 20

If a muscle is named 'longissimus,' what does this indicate about its size?

Accepted Answer

It is the longest muscle in the region

The Muscular System: Structure, Organization, and Function

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