Question 1

Which of the following best describes the action produced by a muscle that crosses on the posterior side of a joint (excluding the knee and ankle)?

Accepted Answer

It produces extension.

Question 2

A muscle that crosses on the medial side of a joint is most likely to produce which movement?

Accepted Answer

Adduction

Question 3

Which fascicle arrangement is characterized by fascicles arranged in concentric rings and is typically found in muscles that act as sphincters?

Accepted Answer

Circular

Question 4

The deltoid muscle is an example of which type of fascicle arrangement?

Accepted Answer

Multipennate

Question 5

Which muscle is the antagonist of the pectoralis major at the shoulder joint?

Accepted Answer

Latissimus dorsi

Question 6

A patient is unable to smile or raise the corners of their mouth. Which muscle is most likely affected?

Accepted Answer

Zygomaticus major

Question 7

Which muscle is primarily responsible for closing the eyelids, as in blinking?

Accepted Answer

Orbicularis oculi

Question 8

If a muscle is named 'biceps brachii,' what does the prefix 'biceps' indicate?

Accepted Answer

It has two origins.

Question 9

Which of the following muscles is a prime mover of jaw closure?

Accepted Answer

Temporalis

Question 10

A muscle with fascicles that run parallel to the long axis of the muscle and is straplike in appearance is best classified as which type?

Accepted Answer

Parallel

Question 11

Which of the following statements about pennate muscles is correct?

Accepted Answer

They have short fascicles that attach obliquely to a central tendon, making them powerful.

Question 12

Which muscle is responsible for compressing the cheek, as in whistling or sucking?

Accepted Answer

Buccinator

Question 13

A muscle that crosses on the lateral side of a joint produces which movement?

Accepted Answer

Abduction

Question 14

Which of the following best explains why bipennate and multipennate muscles are more powerful than parallel muscles?

Accepted Answer

They contain more muscle fibers per unit area, increasing force production.

Question 15

Which muscle is responsible for raising the eyebrows and wrinkling the forehead?

Accepted Answer

Frontal belly of epicranius

Question 16

A muscle named 'flexor carpi radialis longus' can be inferred to:

Accepted Answer

Flex the wrist and attach to the radius, and is long in length

Question 17

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

Accepted Answer

Muscle color

Question 18

If a patient has difficulty blinking and closing their eyes, which cranial nerve is most likely affected?

Accepted Answer

Cranial nerve VII (facial)

Question 19

Which muscle is a synergist that immobilizes a bone or muscle’s origin, providing a stable base for the prime mover?

Accepted Answer

Fixator

Question 20

A patient presents with an inability to pucker their lips, as in whistling. Which muscle is most likely impaired?

Accepted Answer

Orbicularis oris

Chapter 10: The Muscular System – Structure, Function, and Major Muscles

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