Lab test 2 Flashcards
The zone of proliferation is characterized by what?
Stacked chondrocytes in hyaline cartilage
What is the the next zone of chondro ossification after the zone of proliferation? How does this look compared to the zone of proliferation?
The zone of maturation, where the stacked chondrocytes lacunae increase in size
What is the zone after the zone of maturation? How does this appear compared to the zone of maturation?
The zone of hypertrophy, characterized by increased lacunae size, and calcification
What is the zone after the zone of hypertrohpy? How does this appear compared to the zone of hypertrophy?
The zone of calcification
No cells, as well as increased calcified cartilage
Does calcified cartilage have cells?
No
What is the zone after the zone of calcification?
The zone of resorption
What is characteristic of calcified cartilage histologically? How does this compare to bone?
It is very basophilic, and will stain lighter than bone
Also, cells are ABSENT
Is osteoid acidophilic or basophilic?
Acidophilic
Are osteoclasts acidophilic or basophilic?
Acidphilic
What are the three characteristics of plasma cells histologically?
- eccentrically place nuclei
- clockface/ heterochromatic nucleus
- Negative golgi
How can you distinguish between elastic fibers and reticular fibers?
By the type of cells that surround them
How do reticular fibers and elastic fibers appear histologically?
Black fibers that branch
Is bone acidophilic or basophilic?
acidophilic
Are osteoblasts acidophilic or basophilic? What shape are they? Does their gogli stain well? How will its nucleus appear?
- Basophilic (ribosomes)
- Cuboidal shape
- negtive golgi
- Euchromatic nucleus
Are osteoclasts acidophilic or basophilic? Do they have one or many nuclei?
Acidophilic due to lysosomes
Multinucleated
What are the canals that connect Halversian canals?
Volkmann’s
Is the periosteum acidophilic or basophilic?
acidophilic
What type of connective tissue is in periosteum?
Dense, irregular
Where in the periosteum are osteoblasts?
In the dark layer on the matrix side
Are multipolar neurons acidophilic or basophilic?
Basophilic due to rER
What is the nissl substance?
rER
How does the axon hillock appear?
Devoid of nissl substance
What is the black ring the surrounds some neuron?
The myelin of a Schwann cell
How does myelin appear in micrographs?
Black (osmium i think)