Question 1

Which type of muscle fascicle arrangement allows for the greatest range of motion but generally produces the least amount of force?

Accepted Answer

Parallel

Question 2

A patient is unable to extend their knee after a sports injury. Which muscle group is most likely affected?

Accepted Answer

Quadriceps femoris

Question 3

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

Accepted Answer

The load is between the applied force and the fulcrum

Question 4

The biceps brachii muscle is an example of which class of lever?

Accepted Answer

Third-class lever

Question 5

Which muscle is primarily responsible for abduction of the arm at the shoulder joint?

Accepted Answer

Deltoid

Question 6

A muscle named 'flexor carpi radialis' most likely performs which action?

Accepted Answer

Flexes the wrist on the radial side

Question 7

Which of the following muscles is a synergist to the biceps brachii during elbow flexion?

Accepted Answer

Brachialis

Question 8

Which muscle arrangement is best suited for generating the greatest tension?

Accepted Answer

Pennate

Question 9

If a muscle is named 'rectus femoris,' what does the term 'rectus' indicate about the muscle fibers?

Accepted Answer

They run parallel to the long axis

Question 10

Which of the following is NOT a function of the axial muscles?

Accepted Answer

Move the upper and lower limbs

Question 11

A muscle that acts as a fixator during a movement:

Accepted Answer

Stabilizes the origin of the agonist by preventing movement at another joint

Question 12

Which muscle is responsible for plantar flexion at the ankle during activities such as standing on tiptoe?

Accepted Answer

Gastrocnemius

Question 13

Which of the following best describes the action of the orbicularis oris muscle?

Accepted Answer

Constricts the mouth opening

Question 14

A patient presents with difficulty in lateral rotation of the shoulder. Which muscle is most likely weakened?

Accepted Answer

Infraspinatus

Question 15

Which muscle group is primarily responsible for flexion of the vertebral column?

Accepted Answer

Rectus abdominis

Question 16

Which of the following terms indicates a muscle that decreases the angle at a joint?

Accepted Answer

Flexor

Question 17

Which muscle is the strongest jaw muscle and is primarily responsible for elevating the mandible?

Accepted Answer

Masseter

Question 18

Which of the following muscles is NOT part of the rotator cuff?

Accepted Answer

Teres major

Question 19

During a push-up, which muscle acts as the primary agonist for elbow extension?

Accepted Answer

Triceps brachii

Question 20

Which of the following best explains why pennate muscles can generate more tension than parallel muscles of the same size?

Accepted Answer

Pennate muscles contain more myofibrils per unit area

Study Guide: The Muscular System (Anatomy & Physiology, Chapter 11)

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