Deck 11: A: Anatomy of the Muscular System

Question 1

In a lever system,the fixed pivot around which the rod moves is called the fulcrum.

Answer 1

True

Question 2

Tendons are often continuous with the endosteum of bone tissue.

Answer 2

False

Question 3

There are more than 600 muscles in the body.

Answer 3

True

Question 4

The gluteus muscles are examples of muscles that are named by location.

Question 5

When a muscle contracts,the bone moved is the bone of insertion.

Question 6

The Achilles tendon is common to both the gastrocnemius and the soleus.

Question 7

A set of scales and a pair of scissors are both examples of second-class levers.

Question 8

Contraction of the internal intercostal muscles elevates the ribs.

Question 9

In muscle terminology,the term rectus means straight.

Question 10

Tendons are continuous with the layer of connective tissue called the epimysium.

Question 11

The epimysium,endomysium,and perimysium may all be continuous with ligaments.

Question 12

The muscles of facial expression are unique in that at least one of their points of attachment is to the deep layers of skin over the face or neck.

Question 13

Tipping the head back on its atlas is an example of a third-class lever.

Question 14

The insertion is that point of attachment that does not move when the muscle contracts.

Question 15

The direction of the fibers composing a muscle is not significant to its function.

Question 16

The deltoid is an example of a multifunction muscle.

Question 17

Muscles usually act singly as a prime mover.

Question 18

Muscles usually originate distal to the point of insertion.

Question 19

Intrinsic foot muscles are responsible for movement of the ankle and foot.

Question 20

Convergent muscles are said to be "featherlike" in appearance.

Question 21

Most muscles span a joint.

Question 22

The soleus muscle is responsible for plantar flexion.

Question 23

The maintenance of body posture depends only on skeletal muscles and bones.

Question 24

That which is considered the origin and insertion of a muscle may change under certain circumstances.

Question 25

Agonists and prime movers are interchangeable terms.

Question 26

Fascia is another term for epimysium.

Question 27

Antagonist muscles oppose the movement of the agonist muscle.

Question 28

Fascia is a general term for the fibrous connective tissue found under the skin and around muscle.

Question 29

Muscles maintain posture by the property of tonicity.

Question 30

The gastrocnemius and soleus muscles act as antagonists.

Question 31

The respiratory,digestive,circulatory,excretory,and endocrine systems all contribute to the ability of muscles to maintain posture.

Question 32

Just as individual bones are the organs of the skeletal system,individual muscles are the organs of the muscular system.

Question 33

Muscle cells and muscle fibers are interchangeable terms.

Question 34

The skeletal muscles are unique because they are the only organs made up of one kind of tissue.

Question 35

The circulatory system is responsible for muscle tone.

Question 36

Muscle can have only one origin attachment and one insertion attachment.

Question 37

Groups of muscle cells held together by the perimysium are called fascia.

Question 38

With aging,connective tissue replaces some muscle fibers,causing decreased muscle strength.

Question 39

Poor posture puts abnormal strain on bones and may eventually produce deformities.

Question 40

Tendons and aponeuroses are both fibrous tissue extending from a muscle.

Question 41

Lumbrical muscles are examples of intrinsic muscles of the hand.

Question 42

Both the pectoralis minor and the serratus anterior help hold or "fix" the scapula in place.

Question 43

Fixator muscles would most likely be found at the origin points of muscles rather than at the insertion points of muscles.

Question 44

The two muscle layers of the anterior and lateral abdominal wall have fibers running in different directions.

Question 45

Tendons anchor muscles to bone by attaching to the periosteum of the bone.

Question 46

Movement is one of the most distinctive and easily observed "characteristics of life."

Question 47

The two parts of the epicranium are connected by an aponeurosis.

Question 48

No muscles are both muscles of facial expression and muscles of mastication.

Question 49

There are more than twice as many muscles as there are bones in the body.

Question 50

In a second-class lever,the pull is exerted between the fulcrum and the load.

Question 51

In a first-class lever,the fulcrum lies between the pull and the load.

Question 52

If one of the sternocleidomastoid muscles contracts,it causes a different movement than if both of them contract.

Question 53

If a muscle causes the knee to bend,the origin point is above the knee and the insertion point is below the knee.

Question 54

The difference between a tendon and an aponeurosis is that a tendon is made of connective tissue and an aponeurosis is made of muscle tissue.

Question 55

First- and second-class levers are not as common in the body as third-class levers.

Question 56

The rectus abdominis is an example of a bipennate muscle.

Question 57

To give stability to the shoulder,both the clavicle and scapula have very limited movement.

Question 58

Circular muscles are sometimes called sphincter muscles.

Question 59

The fascia found on the surface of the muscle is called the superficial fascia.

Question 60

If a muscle causes the knee to bend,the insertion point is above the knee and the origin point is below the knee.

Question 61

When a muscle contracts,the part of the body that moves is directly under the belly of the muscle.

Question 62

The deltoid is an example of a muscle named by its shape.

Question 63

Tendon sheaths that surround certain tendons have a lining of slick epithelial membrane that reduces friction.

Question 64

To stabilize a joint,the antagonist must contract while the prime mover contracts.

Question 65

The pectoralis major is an example of a convergent muscle.

Question 66

A fixator muscle can be seen as another type of synergist muscle.

Question 67

Muscles make up about 30% to 40% of our body weight.

Question 68

The occipitofrontalis muscle is actually three muscles.

Question 69

Muscles are sometimes named to reflect their function.

Question 70

The latissimus dorsi muscle is an example of a fusiform muscle.

Question 71

The deltoid muscle is an example of a multipennate muscle.

Question 72

The masseter and temporalis muscle are muscles of mastication that have opposite functions.

Question 73

The sartorius is an example of a unipennate muscle.

Question 74

The muscles that move the head are paired muscles on opposite sides of the body.

Question 75

The sternocleidomastoid muscle is an example of a muscle named by the number of heads.

Question 76

A group of skeletal muscle fibers are called fascicles.

Question 77

The epimysium is deep to the perimysium.

Question 78

When a muscle contracts,the part of the body that moves is usually distal to the belly of the muscle.

Question 79

The orbicularis oris surrounds the eye and allows you to blink.

Question 80

A synergist muscle can be defined as a muscle that facilitates or compliments the prime mover.