$$\text{Mechanical Advantage} = \frac{\text{Effort Arm Length}}{\text{Load Arm Length}}$$

Question 1

Which of the following best describes how skeletal muscles contribute to maintaining homeostasis in the human body?

Accepted Answer

By generating heat during contraction to help regulate body temperature

Question 2

A muscle's origin is typically characterized by which of the following features?

Accepted Answer

It is the less movable, usually proximal attachment point of the muscle

Question 3

Which type of lever system in the body is most common, and what is a classic example?

Accepted Answer

Third-class lever; flexing the forearm at the elbow

Question 4

A patient is unable to fully extend their elbow after an injury. Which muscle role is most likely impaired?

Accepted Answer

Antagonist

Question 5

Which of the following factors does NOT directly affect the amount of power a muscle can produce?

Accepted Answer

The color of the muscle tissue

Question 6

Which fascicle arrangement is best suited for producing the greatest range of motion, and what is an example?

Accepted Answer

Parallel; sartorius muscle

Question 7

If the biceps brachii acts as the agonist during elbow flexion, which muscle acts as the antagonist?

Accepted Answer

Triceps brachii

Question 8

Which muscle role stabilizes the origin of the agonist so that it can act more efficiently?

Accepted Answer

Fixator

Question 9

A muscle named 'flexor carpi ulnaris' is named based on which criteria?

Accepted Answer

Action and location

Question 10

Which of the following equations correctly represents the mechanical advantage of a lever system in the body?

Accepted Answer

$$	ext{Mechanical Advantage} = \frac{	ext{Effort Arm Length}}{	ext{Load Arm Length}}$$

Question 11

Which fascicle arrangement is found in the deltoid muscle?

Accepted Answer

Multipennate

Question 12

During a biceps curl, which muscle acts as a synergist to the biceps brachii?

Accepted Answer

Brachialis

Question 13

Which of the following is NOT a way in which skeletal muscles are named?

Accepted Answer

By the color of the muscle fibers

Question 14

A muscle with a bipennate fascicle arrangement is most likely to:

Accepted Answer

Generate more power but less range of motion

Question 15

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

Accepted Answer

It stabilizes the origin of the agonist

Question 16

Which muscle is named for its shape?

Accepted Answer

Deltoid

Question 17

Which of the following is an example of a second-class lever in the human body?

Accepted Answer

Standing on tiptoe

Question 18

If a muscle is named 'rectus abdominis,' what does 'rectus' indicate?

Accepted Answer

The muscle fibers run parallel to the midline

Question 19

Which of the following muscles is an example of a convergent fascicle arrangement?

Accepted Answer

Pectoralis major

Question 20

A muscle that is responsible for producing a specific movement at a joint is called the:

Accepted Answer

Agonist

Muscle Structure, Function, and Classification in Anatomy & Physiology

Study Guide - Practice Questions