A&P X2

Question 1

The vast majority of the organic component of the bone matrix is composed of

Answer 1

Collagen

Question 2

Calcitonin is secreted by the

Answer 2

Thyroid gland

Question 3

A hormone secreted in response to hypercalcemia would increase:

Answer 3

Excretion of calcium (Ca++) ions &
Osteoblast activity

Question 4

As bone grows in in a child, only two areas of cartilage are left at each epiphysis. These two areas are.

Answer 4

Articular cartilage, & epiphysial plate

Question 5

A common fracture to the distal fibula is called a

Answer 5

Pott’s fracture

Question 6

All of the following are functions of the skeletal system, except
A.) maintenance of pH balance,
B.) thermoregulation,
C.) protective enclosure of the viscera
D.) production of blood cells

Answer 6

Thermoregulation

Question 7

The cells directly responsible for bone mineral deposition are

Answer 7

Osteoblasts

Question 8

A hormone that decreases the activity of osteoclasts is

Answer 8

Calcitonin

Question 9

What is secreted by bone cells to resorb the inorganic component of bone?

Answer 9

Hydrochloric acid

Question 10

In endochondral ossification, the secondary ossification center occurs in the

Answer 10

Epiphysis

Question 11

Cholecalciferol (Vitamin D3) is converted to Calcidiol in the ____

Answer 11

Liver

Question 12

A person who shows signs of hypoexcitability of the nervous and muscular System, including decreased muscle tone and diminished reflexes may be suffering from——

Answer 12

Hypercalcemia

Question 13

Osteocytes “communicate” with one another through gap junctions in channels called

Answer 13

Canaliculi

Question 14

Bone growth by the addition of circumferential lamellae is called

Answer 14

Appositional growth

Question 15

The main function of synovial fluid is

Answer 15

Lubrication

Question 16

The ligament that secures the radius of the ulna to the elbow joint is there

Answer 16

Annular ligament

Question 17

By plantarflexing your ankle you will –

Answer 17

Stand on your toes

Question 18

The deltoid ligament of the ankle is also known as the

Answer 18

Medial collateral ligament

Question 19

All of the following muscles are part of the rotator cuff, except:
-Terres Major,
-infraspinatus
-supraspinatus
-subscapularis
-Terres, Minor

Answer 19

Terres Major

Question 20

The interosseus ligament between the tibia and fibula would be considered a –

Answer 20

Syndesmosis

Question 21

The movement of the scapular medially toward the vertebral column is called

Answer 21

Adduction

Question 22

The rotator cuff muscles extend from the ______to the head of the humorous

Answer 22

Scapula

Question 23

Which of the following is an example of amphiarthrosis?
-hinge joint
-metacarpophalangeal joint
-interosseous membrane btw radius & ulna
-temperomandibular joint

Answer 23

Interosseous membrane btw radius & ulna

Question 24

In fatigue resistant muscle, fiber that is suited for endurance type activities

Answer 24

Red fiber & oxidative

Question 25

The connective tissue found in between fascicles within a muscle is called

Answer 25

Perimysium

Question 26

Canaliculi
(Fig. 3)

Answer 26

AD

Question 27

Volkmann canal

(Fig. 3)

Answer 27

AB

Question 28

Central Canal

(Fig. 3)

Answer 28

C

Question 29

Circumferential lamellae

(Fig. 3)

Answer 29

D

Question 30

Osteon

(Fig. 3)

Answer 30

B

Question 31

Fig. 4
# 31

Answer 31

Actin

Question 32

Fig. 4
# 32

Answer 32

Myosin

Question 33

Fig. 4
#33

Answer 33

Titin

Question 34

Fig. 4
#34

Answer 34

H zone

Question 35

Fig. 4
#35

Answer 35

I band

Question 36

Fig. 4
#36

Answer 36

A band

Question 37

Fig. 4
#37

Answer 37

Z-disk

Question 38

Fig. 4
#38

Answer 38

Sarcomere

Question 39

The molecule involved in the direct, phosphorylation of ADP in skeletal muscle tissue is

Answer 39

Creatine phosphate

Question 40

In other for Crossbridge formation to occur, _______ must move to reveal myosin binding sites.

Answer 40

Tropomyosin

Question 41

You are about to lift a heavy TV set. The short period of time where your muscles are building tension but have not yet started to shorten would be considered_____

Answer 41

Isometric

Question 42

At the neuromuscular junction, the voltage-gated Ca++ channels are located on the

Answer 42

Axon terminal

Question 43

The synaptic vesicles of somatic motor neurons release _________into the sinaptic cleft

Answer 43

Acetylcholine 

Question 44

ATP is required for all of the following except:
-movement of Ca++ into the SR
-Detachment of Crossbridge
-“Cocking” the myosin heads
-movement of Ca++ from SR into sarcoplasm

Answer 44

Movement of Ca++ from SR into sarcoplasm

Question 45

——— is used to store oxygen in myofibers

Answer 45

Myoglobin

Question 46

During a muscle contraction, which of the following parts of the Sacomere gets smaller

Answer 46

I band

Question 47

The movement of sodium ions into the muscle cell moves the electrical charge inside the cell in the positive direction. This is called.

Answer 47

Depolarization

Question 48

After running for about 15 seconds the source of ATP for the next 30 to 40 seconds would be from

Answer 48

Anaerobic respiration

Question 49

A powerful muscle group like the hamstring (thight) would most likely have a high ratio of white to red fiber. true or false

Answer 49

True

Question 50

Increasing the frequency of action potentials to a motor unit is called

Answer 50

Temporal summation