Cartilage And Bones

Question 1

Cartilage composed of … derived from …

Answer 1

Chondrocytes

Fibroblasts

Question 2

Chondrocytes located in matrix cavities called

Answer 2

Lacunae

Question 3

How is cartilage nourished

Answer 3

Capillaries of perichondrium or synovial fluid from joint cavities

Question 4

Principal collagen in hyaline cartilage?

Answer 4

Type II collagen

Question 5

Hydration percentage of hyaline cartilage

Answer 5

60 to 78 percent

Question 6

Hyaline cartilage characterized by predominately type 2 collagen but elastic cartilage?

Answer 6

Elastic fibers in addition to type 2 collagen

Question 7

Hyaline cartilage undergoes calcification.

Answer 7

Elastic cartilage does not. Found in ear auricle and auditory canal, epiglottis, cuneiform cartilage

Question 8

What is predominant in fivrocartliage

Answer 8

Type 1 collagen

Question 9

Location of fibrocartilage

Answer 9

Iv disc, symphosis pubis, sternoclavicular and temporomandivular joints. Resistance to compression and shear

Question 10

2 forms of cartilage growth, namely

Answer 10

Appositional and interstitial

Question 11

In appositional growth?

Answer 11

Fibroblasts in perichobdrium differentiate into chondrobalsts and synthesize new matrix. Growth is from outside cartilage mass

Question 12

In interstitial growth?

Answer 12

Pre existing chondrocytes mitotically divide to synthesize new matrix from within cartilage mass. Occurs at epiphyses and in articular cartilages

Question 13

Bone matrix consists of

Answer 13

Collagen and mineralized ground substance.

Dine by calcium and phosphorus in the form of hydroxyapatite crystals

Question 14

Canaliculi?

Answer 14

Osteocyte processes contain within a tunnel. Thise from other lacunar join to form a network through the mineralized tissue

Question 15

Funtions of osteoblasts

Answer 15

Synthesise osteoid and mediate mineralisaztion

Question 16

Osteocytes

Answer 16

Inactive osteoblasts trapped in bone. Assist in bone nutrition

Question 17

Osteoclasts

Answer 17

Phagocytic cells for bone resorption

Question 18

Osteoid

Answer 18

Unmineralized bone matrix

Question 19

Osteogenic cells?

Answer 19

Stem cell in inner layer if periosteum that give rise to osteoblasts

Question 20

Bone forms?

Answer 20

Woven bone and lamellar or mature bone

Question 21

Fibrous coverings of the bone are?

Answer 21

Periosteum and endosteum

Question 22

2 forms of bone growth, what a re they

Answer 22

Endochondral : replacement if fetal cartilage with bone. In irregular, short bones

Intramembranius : replacement of thin connective tissue membrane with bone..
In flat bones

Question 23

Functions if cartilage

Answer 23

Stress bearing without permanent distortion
Shock absorber
Development of long bo es
Supports soft tissue

Question 24

Cartilages form masses of cells with relatively little intercellular material caleld

Answer 24

Precartilage cells (Blastema)

Question 25

Cartilages derive from

Answer 25

Mesenchyme

Question 26

Cartilage. Form masses of cells with relatively little intercellular material…

Answer 26

Precartilage cells(blastema)