$$ \text{Mechanical Advantage} = \frac{\text{Length of Force Arm}}{\text{Length of Load Arm}} $$

Question 1

Which connective tissue layer directly surrounds each individual skeletal muscle fiber?

Accepted Answer

Endomysium

Question 2

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

Accepted Answer

A discrete area within the fascia that is overly irritable or inflamed

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 most 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 third-class lever system, such as the elbow joint, where is the force applied relative to the load and fulcrum?

Accepted Answer

Force is applied in the middle, load at one end, fulcrum at the other end

Question 7

Which equation best represents the concept of mechanical advantage in lever systems?

Accepted Answer

$$ 	ext{Mechanical Advantage} = \frac{	ext{Length of Force Arm}}{	ext{Length of Load Arm}} $$

Question 8

A patient presents with pain, swelling, and limited movement after overstretching a muscle. What is the most likely diagnosis?

Accepted Answer

Muscle strain

Question 9

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

Accepted Answer

Brachialis

Question 10

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

Accepted Answer

Internal intercostals

Question 11

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

Accepted Answer

Levator ani

Question 12

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

Accepted Answer

Serratus anterior

Question 13

A rotator cuff injury most commonly affects which tendon?

Accepted Answer

Supraspinatus

Question 14

Which muscle is the main dorsiflexor of the foot?

Accepted Answer

Tibialis anterior

Question 15

If the calcaneal tendon is ruptured, which movement will be lost?

Accepted Answer

Plantarflexion of the foot

Question 16

Which muscle group is responsible for extension of the leg at the knee joint?

Accepted Answer

Quadriceps femoris

Question 17

Which muscle assists with both flexion and adduction of the humerus at the shoulder joint?

Accepted Answer

Coracobrachialis

Question 18

Which muscle is responsible for elevating the mandible during mastication?

Accepted Answer

Masseter

Question 19

Which muscle rotates the head toward the opposite shoulder when acting individually?

Accepted Answer

Sternocleidomastoid

Question 20

Which muscle compresses the abdominal cavity, raising intra-abdominal pressure?

Accepted Answer

Transversus abdominis

Study Guide: The Muscular System (Anatomy & Physiology)

Study Guide - Practice Questions