$$Effort \times Effort\ Distance = Load \times Load\ Distance$$

Question 1

Which of the following best describes the role of a synergist muscle during a biceps curl exercise?

Accepted Answer

It assists the biceps brachii by adding extra force and reducing unnecessary movement.

Question 2

A muscle that crosses the anterior side of a joint typically produces which type of movement?

Accepted Answer

Flexion

Question 3

Which naming criterion is used for the muscle 'biceps brachii'?

Accepted Answer

Number of origins and location

Question 4

What is the main advantage of a lever system operating at a mechanical advantage?

Accepted Answer

It allows a small effort to move a large load.

Question 5

Which fascicle arrangement is most likely to produce the greatest power in a muscle?

Accepted Answer

Multipennate

Question 6

A muscle named 'extensor carpi radialis longus' is named based on which combination of criteria?

Accepted Answer

Action, location, bone, and length

Question 7

In a third-class lever system, which of the following is the correct arrangement?

Accepted Answer

Fulcrum - Effort - Load

Question 8

If a muscle has fibers running at right angles to an imaginary axis, which term is likely to be part of its name?

Accepted Answer

Transversus

Question 9

Which muscle group acts to oppose or reverse the action of a prime mover?

Accepted Answer

Antagonists

Question 10

A patient is unable to abduct their arm at the shoulder. Which muscle is most likely impaired?

Accepted Answer

Deltoid

Question 11

Which of the following equations correctly represents the principle of levers for mechanical advantage?

Accepted Answer

$$Effort 	imes Effort\ Distance = Load 	imes Load\ Distance$$

Question 12

Which fascicle arrangement is best suited for muscles that control openings, such as the orbicularis oris?

Accepted Answer

Circular

Question 13

During a push-up, which muscle acts as the antagonist to the pectoralis major?

Accepted Answer

Latissimus dorsi

Question 14

Which lever class is exemplified by standing on your toes?

Accepted Answer

Second-class lever

Question 15

A muscle named 'deltoid' is named based on which criterion?

Accepted Answer

Shape

Question 16

Which of the following statements about pennate muscles is correct?

Accepted Answer

They have many fibers attaching obliquely to a tendon, making them powerful.

Question 17

Which muscle would be classified as a bipennate muscle based on its fascicle arrangement?

Accepted Answer

Rectus femoris

Question 18

A muscle that stabilizes the origin of another muscle, allowing the prime mover to act more efficiently, is called a:

Accepted Answer

Fixator

Question 19

Which of the following is true regarding muscles that have fibers more parallel to the long axis?

Accepted Answer

They shorten more and have a greater range of motion.

Question 20

Which of the following best explains why a third-class lever system in the human body is advantageous for movement?

Accepted Answer

It sacrifices force for speed and range of motion, allowing rapid and wide movements.

Chapter 10: The Muscular System – Structure, Function, and Mechanics

Study Guide - Practice Questions