Question 1

Which of the following best describes the 'origin' of a skeletal muscle?

Accepted Answer

The attachment to an immovable or less movable bone

Question 2

During a biceps curl, which bone serves as the insertion for the brachialis muscle?

Accepted Answer

Ulna

Question 3

If a person is standing and then bends forward at the waist, which movement is primarily occurring at the hip joint?

Accepted Answer

Flexion

Question 4

Which of the following movements describes increasing the angle between two bones, such as straightening the elbow?

Accepted Answer

Extension

Question 5

A gymnast performing a backbend is demonstrating which type of movement at the spine?

Accepted Answer

Hyperextension

Question 6

Which term describes the muscle that opposes or reverses a particular movement?

Accepted Answer

Antagonist

Question 7

When you turn your palm from facing up to facing down, which movement are you performing?

Accepted Answer

Pronation

Question 8

Which of the following best describes the action of a synergist muscle?

Accepted Answer

It assists the prime mover and reduces undesirable movements

Question 9

A patient is unable to dorsiflex their foot after an injury. Which movement are they unable to perform?

Accepted Answer

Lifting the foot so the toes move toward the shin

Question 10

Which of the following muscle arrangements is characterized by fascicles converging toward a single tendon of insertion?

Accepted Answer

Convergent

Question 11

A baseball pitcher rotates his arm so that his palm faces downward before throwing. Which movement is this?

Accepted Answer

Pronation

Question 12

Which muscle role is responsible for stabilizing the origin of a prime mover during movement?

Accepted Answer

Fixator

Question 13

During walking, which movement occurs at the knee as you bring your heel toward your buttocks?

Accepted Answer

Flexion

Question 14

Which of the following best describes circumduction?

Accepted Answer

Movement of a limb in a circular motion, combining flexion, extension, abduction, and adduction

Question 15

If a muscle crosses the anterior side of a joint, which movement is it most likely to produce?

Accepted Answer

Flexion

Question 16

A patient is asked to stand on their tiptoes. Which movement at the ankle joint does this demonstrate?

Accepted Answer

Plantar flexion

Question 17

Which of the following is an example of a multipennate muscle?

Accepted Answer

Deltoid

Question 18

A person spreads their fingers apart. Which movement is this?

Accepted Answer

Abduction

Question 19

Which of the following equations best represents the relationship between muscle force ($$F$$), lever arm length ($$r$$), and torque ($$	au) $$produced at a joint?

Accepted Answer

$$	au = F 	imes r$$

Question 20

A patient with a damaged radial nerve cannot extend their wrist. Which muscle group is most likely affected?

Accepted Answer

Wrist extensors

The Muscular System: Body Movements and Muscle Attachments

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