The Musculoskeletal system

Question 1

The bone of the thigh is the... 
A) radius.
B) ulna.
C) humerus.
D) femur.
E) tibia.

Answer 1

D) femur.

Question 2

Osteoclasts... 
A) deposit calcium into bone.
B) destroy bone matrix.
C) are a type of white blood cell.
D) B and C are correct.
E) None of the above are correct.

Answer 2

E) None of the above are correct.

Question 3

An inflammation of the joints is called... 
A) bursitis.
B) tendonitis.
C) arthritis.
D) perichondritis.
E) chondritis.

Answer 3

C) arthritis

Question 4

An adult who over secretes GH doesn’t get taller. Why not?
A) GH doesn’t affect bones.
B) Epiphyseal plates are closed in adults.
C) Adult bones have dead cells
D) The adult dies too soon to grow.
E) Adults can’t secrete GH.

Answer 4

B) Epiphyseal plates are closed in adults

Question 5

The difference in the strength of the muscle contraction needed to pick up a pencil versus lift a 30-pound weight is dependent on… (1p)
A) the number of antagonists involved.
B) the size of the motor units involved.
C) the use of glycogen as a primary energy source.
D) the number of motor units involved.
E) both the size and the number of the motor units involved.

Answer 5

D) the number of motor units involved.

Question 6

A medical term that means inflammation of the joints is... (1p)
A) bursitis.
B) tendonitis.
C) arthritis.
D) perichondritis.
E) chondritis.

Answer 6

C) arthritis.

Question 7

The shaft of a long bone is called the...(1p)
A) epiphysis.
B) diaphysis.
C) metaphysis.
D) periosteum.
E) endosteum

Answer 7

B) diaphysis.

Question 8

The single bone that makes up the upper arm is called the... (1p)
A) radius.
B) ulna.
C) humerus.
D) femur.
E) tibia.

Answer 8

C) humerus.

Question 9

Sac-like structures that are strategically located to reduce friction between skin and underlying bones during synovial joint movements are called... (1p)
A) tendons.
B) ligaments.
C) menisci.
D) accessory ligaments.
E) bursae.

Answer 9

E) bursae.

Question 10

The site where bone lengthening occurs in a long bone is called the… (1p)

Answer 10

The EPIPHYSEAL PLATE is the area of growth in a long bone. It is a layer of hyaline cartilage where ossification occurs in immature bones.

Question 11

What are de functions of the muscels? (4st)

Answer 11

1. produce movements
2. stabilize body positions
3. store and move substances
4. produce heat

Question 12

What is elongated cylindrical cells?

Answer 12

muscle fibers

Question 13

Små cylinderformade organeller som utgör en viktig beståndsdel av muskelfibrer. —- är i sin tur uppbyggda av en ännu mindre enhet: sarkomerer

Answer 13

myofibril

Question 14

which organell stores calcium ions?

Answer 14

sarcoplasmic reticulum

Question 15

What kan we find in sarcoplasm that is similar to hemoglobin?

Answer 15

myoglobin

Question 16

What contains myofibrils of?

Answer 16

thin and thick filaments

Question 17

Which three proteins do we find in the thick filament?

Answer 17

actin, troponin, tropomyosin

Question 18

What factors can cause fatigue?

Answer 18

limited:
- Ca+2
- Creatine phosphate
- oxygen
- atp

Question 19

Which four cells are common in bones?

Answer 19

1. osteogenic- provide cell division, develops into osteoblast
2. osteoblast - bone buildning cells
3. osteocytes - mature bone cells, are the main cells in bones
4. osteoclasts - relese enzyms

Question 20

What is a osteons?

Answer 20

a cylinder running along the diaphysis, contains blood vessels

Question 21

What is a partial fracture?

Answer 21

It is a incomplete break