Question 1

When lifting your arm to the side (abduction), which muscle acts as the agonist, and which acts as the antagonist? Where would you expect to find a synergist for this movement?

Accepted Answer

Agonist: Deltoid; Antagonist: Teres major; Synergist location: shoulder region

Question 2

A fixator muscle functions to:

Accepted Answer

Stabilize the origin of the agonist

Question 3

The styloglossus muscle pulls the tongue back in after it is stuck out. What role does the styloglossus play in this movement?

Accepted Answer

Antagonist

Question 4

Based on their locations, which statement is most likely true about the gastrocnemius, soleus, and tibialis anterior muscles?

Accepted Answer

The gastrocnemius and the tibialis anterior are antagonists

Question 5

Which muscle naming convention is used for the 'extensor digitorum muscle'?

Accepted Answer

Muscle action and location of attachments

Question 6

Based on the name, how does the fibularis brevis compare to the fibularis longus?

Accepted Answer

The fibularis brevis muscle is relatively short while the fibularis longus is relatively long

Question 7

Which of the following muscle names does NOT provide information about the muscle’s actions?

Accepted Answer

Transverse abdominis

Question 8

Which fascicle arrangement is most well suited to a muscle that needs to generate a lot of force over a small distance?

Accepted Answer

Multipennate

Question 9

Which of the following muscles does NOT belong in a group based on fascicle arrangement?

Accepted Answer

Interossei

Question 10

In what type of lever is the force applied between the fulcrum and the load?

Accepted Answer

Third-class

Question 11

The majority of the lever systems in the arms and legs are third-class levers. Which of the following statements is correct?

Accepted Answer

The muscles of the arms and legs usually work at a mechanical disadvantage

Question 12

During a muscle contraction, which part moves toward which?

Accepted Answer

The insertion moves towards the origin during contraction

Question 13

The flexor carpi ulnaris is a muscle that adducts and flexes the hand at the wrist. The muscle attaches to both the humerus and the base of the 5th metacarpal. Based on the movement that this muscle performs, which attachment is the origin?

Accepted Answer

Humerus

Question 14

The masseter muscle is involved in chewing. Where is its insertion?

Accepted Answer

Mandible

Question 15

Which of the following best describes the relationship between the length and number of muscle fibers and the muscle’s function?

Accepted Answer

Length of fibers determines range of contraction; number of fibers determines force of contraction

Question 16

A muscle with a circular fascicle arrangement is best suited for which function?

Accepted Answer

Closing an opening, such as the mouth or eye

Question 17

Which of the following is an example of a muscle named for its number of heads?

Accepted Answer

Biceps femoris

Question 18

If a muscle’s origin is on the pubis and its insertion is on the linea aspera of the femur, what movement would contraction of this muscle most likely produce?

Accepted Answer

Adduction of the thigh

Question 19

Which lever system is exemplified by the action of the hamstring muscles flexing the knee, and does this system work at a mechanical advantage or disadvantage?

Accepted Answer

Third-class lever; mechanical disadvantage

Question 20

Which muscle shape is best suited for generating a large range of movement but less force?

Accepted Answer

Parallel

Muscular System Study Guide: Muscle Actions, Naming, Fascicle Arrangements, Levers, Origins & Insertions

Study Guide - Practice Questions

Study Guide - Flashcards