$$F \times d_F = L \times d_L$$

Question 1

Which fascicle arrangement allows a muscle to generate the greatest tension, and why?

Accepted Answer

Pennate arrangement, because more fibers are packed into the muscle increasing tension.

Question 2

A muscle with fascicles running parallel to its long axis will typically:

Accepted Answer

Shorten and increase in diameter when contracted.

Question 3

Which type of muscle fascicle arrangement is best suited for changing the direction of pull during contraction?

Accepted Answer

Convergent

Question 4

The biceps brachii muscle is an example of which fascicle arrangement?

Accepted Answer

Parallel

Question 5

Which of the following is true about pennate muscles?

Accepted Answer

They can be unipennate, bipennate, or multipennate depending on tendon arrangement.

Question 6

A muscle that acts as a sphincter, such as the orbicularis oris, has which fascicle arrangement?

Accepted Answer

Circular

Question 7

In a third-class lever system, which of the following is true?

Accepted Answer

The applied force is between the fulcrum and the load.

Question 8

Which lever class is most common in the human body and what is its mechanical advantage?

Accepted Answer

Third-class lever; increases speed and range of motion but requires more force.

Question 9

If a muscle's origin is proximal and its insertion is distal, contraction will:

Accepted Answer

Move the insertion toward the origin.

Question 10

Which muscle acts as the antagonist to the biceps brachii during elbow flexion?

Accepted Answer

Triceps brachii

Question 11

A muscle named 'flexor carpi radialis' provides which information about its function and location?

Accepted Answer

It flexes the wrist on the radial side.

Question 12

Which muscle group is responsible for positioning the pectoral girdle?

Accepted Answer

Appendicular muscles

Question 13

What is the primary action of the masseter muscle?

Accepted Answer

Elevation of the mandible for mastication

Question 14

Which muscle is an example of a multipennate muscle?

Accepted Answer

Deltoid

Question 15

If a muscle is named 'biceps femoris,' what does the name indicate?

Accepted Answer

It has two origins and is located in the thigh.

Question 16

Which equation best represents the relationship in a lever system?

Accepted Answer

$$F 	imes d_F = L 	imes d_L$$

Question 17

A patient has difficulty closing their mouth due to muscle weakness. Which muscle is most likely affected?

Accepted Answer

Masseter

Question 18

Which muscle arrangement is most efficient for producing rapid, large movements but not maximal force?

Accepted Answer

Parallel

Question 19

Which muscle is responsible for flexion at the elbow and is considered the prime mover?

Accepted Answer

Biceps brachii

Question 20

Which of the following is NOT a criterion used in naming skeletal muscles?

Accepted Answer

Number of mitochondria

The Muscular System: Fascicle Arrangement and Functional Anatomy

Study Guide - Practice Questions