Question 1

Which connective tissue layer directly surrounds individual skeletal muscle fibers?

Accepted Answer

Endomysium

Question 2

A muscle knot, or myofascial trigger point, is best described as:

Accepted Answer

A region of the fascia that is overly irritable or inflamed, causing sustained contraction and pain

Question 3

Which muscle shape is characterized by fascicles that feather out from both sides of a single tendon?

Accepted Answer

Bipennate

Question 4

A muscle named 'Flexor Digitorum Profundus' is likely located:

Accepted Answer

Deep to the Flexor Digitorum Superficialis

Question 5

Which functional group of muscles is responsible for holding a bone in place to make movement more efficient?

Accepted Answer

Fixators

Question 6

In a lever system, which component corresponds to the joint at which movement occurs?

Accepted Answer

Fulcrum

Question 7

Which type of lever is most common in the human body and is exemplified by the elbow joint?

Accepted Answer

Third-class lever

Question 8

A lever system with the fulcrum close to the load allows a large load to be moved with a smaller force. This is known as:

Accepted Answer

Mechanical advantage

Question 9

A muscle strain is best treated initially by the PRICE method. Which step is NOT part of PRICE?

Accepted Answer

Physical therapy

Question 10

Which muscle is the primary agonist for flexion of the forearm at the elbow joint?

Accepted Answer

Brachialis

Question 11

During forced expiration, which muscles are primarily responsible for depressing the rib cage?

Accepted Answer

Internal intercostals

Question 12

Which muscle group is most likely to be strengthened by Kegel exercises to treat urinary incontinence?

Accepted Answer

Levator ani

Question 13

The rotator cuff muscles stabilize the shoulder joint. Which muscle is NOT part of the rotator cuff?

Accepted Answer

Deltoid

Question 14

Which muscle is nicknamed the 'boxer's muscle' due to its role in protracting the scapula?

Accepted Answer

Serratus anterior

Question 15

A patient presents with inability to plantarflex the foot after a sudden 'pop' in the heel during a sports event. Which structure is most likely injured?

Accepted Answer

Calcaneal tendon

Question 16

Which muscle is responsible for dorsiflexion and inversion of the foot?

Accepted Answer

Tibialis anterior

Question 17

The quadriceps femoris group is responsible for extension of the leg at the knee joint. Which muscle also assists with thigh flexion?

Accepted Answer

Rectus femoris

Question 18

Which muscle group is divided into three columns along each side of the vertebral column and is responsible for extension and lateral flexion?

Accepted Answer

Erector spinae

Question 19

If the origin and insertion of a muscle switch during a movement, which muscle is capable of flexing the trunk when the femur is fixed?

Accepted Answer

Iliopsoas

Question 20

Which muscle is responsible for elevating the mandible during mastication?

Accepted Answer

Masseter

The Muscular System: Structure, Function, and Major Muscles

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