Question 1

Which of the following best describes how skeletal muscles produce movement?

Accepted Answer

By contracting and pulling on bones, which act as levers to produce movement.

Question 2

In the context of body movement, what is the relationship between bones and skeletal muscles?

Accepted Answer

Bones act as levers and skeletal muscles provide the force to move them.

Question 3

Which of the following correctly defines 'origin' and 'insertion' of a muscle?

Accepted Answer

Origin is the fixed attachment, and insertion is the movable attachment.

Question 4

A lever in the human body consists of which of the following components?

Accepted Answer

A rigid bar (bone), a fulcrum (joint), and forces (muscle contraction and load).

Question 5

Which type of lever is most common in the human body?

Accepted Answer

Third-class lever

Question 6

Which fascicle arrangement allows for the greatest range of motion but the least power?

Accepted Answer

Parallel

Question 7

If the biceps brachii is the prime mover for elbow flexion, which muscle acts as its antagonist?

Accepted Answer

Triceps brachii

Question 8

Which of the following is NOT a criterion used in naming skeletal muscles?

Accepted Answer

Number of mitochondria

Question 9

Which muscle is primarily responsible for chewing (mastication)?

Accepted Answer

Masseter

Question 10

A patient is unable to flex their wrist. Which muscle is most likely impaired?

Accepted Answer

Flexor carpi radialis

Question 11

Which muscle is the primary muscle of inspiration (breathing in)?

Accepted Answer

Diaphragm

Question 12

Which muscle group is responsible for extending the knee?

Accepted Answer

Quadriceps femoris

Question 13

A synergist muscle assists the prime mover by:

Accepted Answer

Adding extra force and reducing unnecessary movement.

Question 14

Which muscle is responsible for plantar flexion of the foot (standing on tiptoe)?

Accepted Answer

Gastrocnemius

Question 15

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

Accepted Answer

The fulcrum is between the effort and the load.

Question 16

Which muscle is primarily responsible for abducting the arm at the shoulder?

Accepted Answer

Deltoid

Question 17

Which muscle is the main flexor of the forearm at the elbow?

Accepted Answer

Biceps brachii

Question 18

Which muscle is responsible for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 19

Which of the following muscles is part of the hamstring group?

Accepted Answer

Biceps femoris

Question 20

A patient presents with difficulty extending their wrist. Which muscle is most likely affected?

Accepted Answer

Extensor carpi radialis longus

Skeletal Muscle Anatomy: Structure, Function, and Classification

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