a&p test 2 questions

Question 1

A fibrous joint that is a peg-in-socket is called a

Answer 1

gomphosis joint

Question 2

In the classification of joints, which of the following is true?

Answer 2

All synovial joints are freely movable.

Question 3

Bending of the tip of the finger exhibits flexion.

Answer 3

True

Question 4

Which of the following is an abnormal lateral curvature of the vertebral column often seen in the thoracic region?

Answer 4

scoliosis

Question 5

Which structure allows the diaphysis of the bone to increase in length until early childhood?

Answer 5

epiphyseal plate

Question 6

Connective tissue sacs lined with synovial membranes that act as cushions in places where friction develops are called

Answer 6

Bursae

Question 7

What structure in skeletal muscle cells functions in calcium storage?

Answer 7

sarcoplasmic reticulum

Question 8

Myoglobin

Answer 8

stores oxygen in muscle cells

Question 9

The frontal bone articulates with the parietal bone by means of the sagittal suture.

Answer 9

False

Question 10

Which of the following are cartilaginous joints?

Answer 10

Synchondroses

Question 11

The canal that runs through the core of each osteon (the Haversian canal) is the site of

Answer 11

blood vessels and nerve fibers

Question 12

Which of the following is the abnormal curve often seen in pregnant women as they attempt to preserve their center of gravity toward the end of the pregnancy?

Answer 12

Lordosis

Question 13

What produces the striations of a skeletal muscle cell?

Answer 13

the arrangement of myofilaments

Question 14

A motor neuron and all the muscle cells that it stimulates are referred to as a motor end plate.

Answer 14

False

Question 15

The cell responsible for secreting the matrix of bone is the

Answer 15

Osteoblasts

Question 16

In an isotonic contraction, the muscle

Answer 16

changes in length and moves the “load”

Question 17

The contractile units of skeletal muscles are

Answer 17

myofibrils

Question 18

Cranial bones develop

Answer 18

within fibrous membranes

Question 19

Which of the following is not a movement that can occur between vertebrae?

Answer 19

Supination

Question 20

What is moving a limb away from the median plane of the body along the frontal plane called?

Answer 20

Abduction

Question 21

Each consecutive bone lamella has collagen fibers that wrap in alternating directions.

Answer 21

True

Question 22

Bones are classified by whether they are weight bearing or protective in function.

Answer 22

False

Question 23

What is the functional unit of a skeletal muscle called?

Answer 23

Sarcomere

Question 24

Articular cartilage found at the ends of the long bones serves to

Answer 24

provide a smooth surface at the ends of synovial joints

Question 25

Muscle tone is the small amount of tautness or tension in the muscle due to weak, involuntary contractions of its motor units.

Answer 25

True

Question 26

Articulations permitting only slight degrees of movement are

Answer 26

amphiarthroses

Question 27

Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same.

Answer 27

False

Question 28

In symphysis joints the articular surfaces of the bones are covered with

Answer 28

hyaline cartilage

Question 29

Muscle tone is the small amount of tautness or tension in the muscle due to weak, involuntary contractions of its motor units.

Answer 29

True

Question 30

What structure in skeletal muscle cells functions in calcium storage?

Answer 30

sarcoplasmic reticulum

Question 31

The structural unit of spongy is called

Answer 31

trabeculae

Question 32

A contraction in which the muscle does not shorten but its tension increases is called isometric contraction.

Answer 32

True

Question 33

When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the A bands do not diminish in length

Answer 33

True

Question 34

Synarthrotic joints

Answer 34

permit essentially no movement

Question 35

Which of the following is not a connective tissue sheath that wraps individual muscle fibers?

Answer 35

aponeurosis

Question 36

The oxygen-binding protein found in muscle cells is

Answer 36

myoglobin

Question 37

The suture that connects the two parietal bones together is the

Answer 37

sagittal

Question 38

During muscle contraction, myosin cross bridges attach to which active sites?

Answer 38

actin filaments

Question 39

Which of the following bone tissues is adapted to support weight and withstand tension stress?

Answer 39

Compact Bone

Question 40

The structural unit of compact bone (osteon) resembles the growth rings of a tree trunk

Answer 40

True

Question 41

Which of these is not a way of classifying muscles?

Answer 41

the type of muscle fibers

Question 42

What kind of tissue is the forerunner of long bones in the embryo?

Answer 42

hyaline cartilage

Question 43

The process of bones increasing in width is known as

Answer 43

appositional growth

Question 44

What is the role of calcium ions in muscle contraction?

Answer 44

bind to regulatory sites on troponin to remove contraction inhibition

Question 45

An osteon contains osteocytes, lamellae, and a central canal, and is found in compact bone only.

Answer 45

True

Question 46

A fracture in the shaft of a bone would be a break in the

Answer 46

diaphysis

Question 47

Which of the following surrounds the individual muscle cell?

Answer 47

endomysium

Question 48

Muscles are only able to pull, they never push

Answer 48

True

Question 49

Bones are constantly undergoing resorption for various reasons. Which of the following cells accomplishes this process?

Answer 49

osteoclast

Question 50

The term aponeurosis refers to

Answer 50

a sheetlike indirect attachment to a skeletal element

Question 51

The reason that intervertebral discs exhibit a large amount of tensile strength, which allows them to absorb shock, is because they possess

Answer 51

collagen fibers

Question 52

What is the functional role of the T tubules?

Answer 52

enhance cellular communication during muscle contraction