Question 1

During a muscle contraction, which structure moves toward the other: the origin or the insertion?

Accepted Answer

The insertion moves toward the origin.

Question 2

A patient is unable to flex their elbow. Which muscle is most likely impaired as the agonist for this movement?

Accepted Answer

Biceps brachii

Question 3

Which of the following best describes the role of a fixator muscle during movement?

Accepted Answer

It stabilizes the origin of the agonist.

Question 4

The flexor carpi ulnaris muscle adducts and flexes the hand at the wrist. It attaches to both the humerus and the base of the 5th metacarpal. Which attachment is the origin?

Accepted Answer

Humerus

Question 5

Which lever class is most common in the human body, especially in the arms and legs, and what is its mechanical advantage?

Accepted Answer

Third-class lever; mechanical disadvantage

Question 6

Which of the following fascicle arrangements is best suited for generating a large amount of force over a small distance?

Accepted Answer

Multipennate

Question 7

A muscle that wraps around an opening, such as the orbicularis oris, is best described as having which fascicle arrangement?

Accepted Answer

Circular

Question 8

If the origin of a muscle is on the pubis and the insertion is on the linea aspera of the femur, what movement is most likely produced when this muscle contracts?

Accepted Answer

Adduction of the thigh

Question 9

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

Accepted Answer

Transverse abdominis

Question 10

The masseter muscle is primarily responsible for which action, and where is its insertion?

Accepted Answer

Chewing; insertion on the mandible

Question 11

Which of the following statements about muscle naming is correct?

Accepted Answer

The term 'longus' indicates a muscle is long.

Question 12

Which muscle acts as the antagonist when the biceps brachii flexes the elbow?

Accepted Answer

Triceps brachii

Question 13

A muscle with a convergent fascicle arrangement has which of the following characteristics?

Accepted Answer

Origin is broader than the insertion

Question 14

Which of the following best describes a second-class lever in the human body?

Accepted Answer

The load is between the fulcrum and the effort

Question 15

Which muscle would be considered a synergist during elbow flexion?

Accepted Answer

Brachialis

Question 16

A patient presents with difficulty abducting their arm at the shoulder. Which muscle is most likely impaired?

Accepted Answer

Deltoid

Question 17

Which of the following statements about fascicle arrangement and muscle function is correct?

Accepted Answer

Shorter fibers generate more force.

Question 18

The genioglossus muscle is the primary muscle for sticking out your tongue. The styloglossus pulls the tongue back in. What is the role of the styloglossus in this movement?

Accepted Answer

Antagonist

Question 19

Which of the following best describes the mechanical advantage of a lever system where the fulcrum is closer to the load than to the effort?

Accepted Answer

Mechanical advantage; less effort needed

Question 20

Which muscle name indicates both the number of origins and the body region?

Accepted Answer

Biceps femoris

Muscles: Structure, Function, and Classification

Study Guide - Practice Questions

Study Guide - Flashcards