Question 1

Which muscle arrangement is depicted in image (a) and is commonly found in muscles such as the orbicularis oris, which controls movements of the mouth?

Accepted Answer

Circular

Question 2

A muscle that crosses on the lateral side of a joint, as shown in the image with the deltoid, produces which movement?

Accepted Answer

Abduction

Question 3

Which fascicle arrangement allows for the greatest range of motion but is typically not very powerful?

Accepted Answer

Parallel

Question 4

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

Accepted Answer

It has two origins.

Question 5

Which muscle group acts as the antagonist to the quadriceps femoris during knee movement?

Accepted Answer

Hamstrings

Question 6

The power of a muscle is primarily determined by which of the following?

Accepted Answer

The number of muscle fibers

Question 7

Which muscle is the prime mover for jaw closure and is innervated by the trigeminal nerve?

Accepted Answer

Masseter

Question 8

What is the primary action of the sternocleidomastoid muscle?

Accepted Answer

Flexes and laterally rotates the head

Question 9

Which muscle arrangement is shown in image (b) and is characteristic of muscles like the pectoralis major?

Accepted Answer

Convergent

Question 10

A muscle that crosses on the anterior side of a joint generally produces which movement, except at the knee and ankle?

Accepted Answer

Flexion

Question 11

Which muscle is responsible for raising the lateral corners of the mouth, as seen in smiling?

Accepted Answer

Zygomaticus major

Question 12

Which muscle arrangement is depicted in image (e) and is typical of the rectus femoris muscle?

Accepted Answer

Bipennate

Question 13

What is the function of the pelvic diaphragm muscles?

Accepted Answer

Support pelvic organs and resist increased intra-abdominal pressure

Question 14

Which muscle is the most important in inspiration and is innervated by the phrenic nerves?

Accepted Answer

Diaphragm

Question 15

If a muscle is named 'extensor carpi radialis longus,' which criteria are used in its naming?

Accepted Answer

Action, location, bone association, and size

Question 16

Which muscle arrangement is depicted in image (d) and is characteristic of the sartorius muscle?

Accepted Answer

Parallel

Question 17

Which muscle group is responsible for flexion of the knee and is antagonistic to the quadriceps femoris?

Accepted Answer

Hamstrings

Question 18

Which muscle arrangement is depicted in image (g) and is characteristic of the extensor digitorum longus?

Accepted Answer

Unipennate

Question 19

Which muscle is responsible for closing the lips and producing movements such as kissing and whistling?

Accepted Answer

Orbicularis oris

Question 20

Which muscle arrangement is depicted in image (f) and is characteristic of the deltoid muscle?

Accepted Answer

Multipennate

The Muscular System: Structure, Function, and Major Muscles

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