$$Work = Force \times Distance$$

Question 1

Which of the following best describes the hierarchical organization of skeletal muscle from largest to smallest structural unit?

Accepted Answer

Muscle belly → fascicle → muscle fiber → myofibril → sarcomere

Question 2

A patient suffers a tear at the site where a muscle attaches to bone via a cord-like structure. Which anatomical term best describes this structure?

Accepted Answer

Tendon

Question 3

According to the sliding filament theory, which two proteins interact to produce muscle contraction within the sarcomere?

Accepted Answer

Actin and myosin

Question 4

Which of the following best explains why pennate muscles can generate more force than parallel muscles of the same size?

Accepted Answer

Pennate muscles have a greater physiological cross-sectional area (PCSA)

Question 5

A muscle that acts as a fixator during a movement is primarily responsible for which of the following?

Accepted Answer

Stabilizing the origin of the prime mover

Question 6

During a biceps curl, as the biceps brachii shortens to lift the weight, what type of muscle contraction is occurring?

Accepted Answer

Concentric isotonic contraction

Question 7

Which of the following muscle names indicates a muscle with two heads of origin?

Accepted Answer

Biceps

Question 8

If a muscle is named 'rectus femoris,' what does the term 'rectus' indicate about the muscle's fiber arrangement?

Accepted Answer

The fibers run straight or parallel to the midline

Question 9

A muscle with a broad origin and fibers converging to a single tendon is best described as having which type of architecture?

Accepted Answer

Convergent

Question 10

Which of the following equations correctly represents mechanical work performed by a muscle?

Accepted Answer

$$Work = Force 	imes Distance$$

Question 11

A muscle that opposes the action of the prime mover during a movement is called the:

Accepted Answer

Antagonist

Question 12

Which connective tissue layer surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 13

A muscle that is responsible for assisting the prime mover in performing its action is called a:

Accepted Answer

Synergist

Question 14

Which of the following best describes the function of a synovial bursa?

Accepted Answer

It reduces friction between moving structures such as tendons and bones

Question 15

If a muscle is named 'adductor longus,' what does the term 'longus' indicate?

Accepted Answer

The muscle is long compared to others in the same group

Question 16

Which of the following statements about muscle contraction is correct?

Accepted Answer

During isometric contraction, muscle length does not change

Question 17

A muscle with fibers arranged at an angle to the tendon, resembling a feather, is described as:

Accepted Answer

Pennate

Question 18

Which of the following best explains why a muscle with a larger physiological cross-sectional area (PCSA) can generate more force?

Accepted Answer

It contains more muscle fibers in parallel, increasing total force output

Question 19

Which of the following is NOT a function of the muscular system?

Accepted Answer

Production of hormones

Question 20

A muscle named 'orbicularis oris' is most likely to have which of the following fiber arrangements?

Accepted Answer

Circular

Tissues-Organs-Systems: Muscles – Structure & Function (Myology)

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