Chapter 10 Part 5 (true or false) Flashcards Preview

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Flashcards in Chapter 10 Part 5 (true or false) Deck (22):
1

A pair of tweezers is a good example of a second-class lever.
(true or false)

false

Tweezers = 3rd class lever

2

Both first and second-class levers operate at a mechanical disadvantage.
(true or false)

false

3

Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same.
(true or false)

false

4

Muscles are only able to pull, they never push.
(true or false)

true

5

Regardless of type, all levers follow the same basic principle: effort farther than load from fulcrum = mechanical advantage; effort nearer than load to fulcrum = mechanical disadvantage.
(true or false)

true

6

The muscle that prevents the biting of the cheek when chewing is the buccinator.
(true or false)

true

7

Muscles that help maintain upright posture are fixators.
(true or false)

true

8

Deep muscles of the thorax promote movements for breathing.
(true or false)

true

9

The deltoid is a prime mover of the arm that acts in adduction.
(true or false)

false

10

The soleus is a synergist of the gastrocnemius during plantar flexion.
(true or false)

true

11

Muscles that help to maintain posture are often called synergists.
(true or false)

false

12

In order to propel food down to the esophagus, the pharyngeal constrictor muscles are used.
(true or false)

true

13

The major head flexors are the sternocleidomastoid muscles, with the help of the muscles attached to the hyoid bone.
(true or false)

true

14

The arrangement of a muscle'ʹs fascicles determines its range of motion and power.
(true or false)

true

15

Muscle power does not depend on the direction of the fascicles.
(true or false)

true

16

The calcaneal tendon (Achilles tendon) is the largest, strongest tendon in the body.
(true or false)

true

17

Electromyography is the recording and interpretation of graphic records of the electrical activity of contracting muscles.
(true or false)

true

18

The broadest muscle of the back is the latissimus dorsi.
(true or false)

true

19

Muscle spasms of the back often are due to the erector spinae contraction.
(true or false)

true

20

Muscles connecting to the hyoid bone are important for swallowing and speech.
(true or false)

true

21

The muscles of facial expression insert into skin or other muscles, not bones.
(true or false)

true

22

Most superficial thorax muscles are extrinsic shoulder muscles.
(true or false)

true