Histology-Final Review Flashcards
What are the different stages of chondrocyte growth?
Resting phase, proliferating phase, hypertrophy phase and ossification phase.
What type of cartilage is being produced at the green arrow. What type of cartilage is being produced at the blue arrow? Why is this?
Green arrow = hyaline cartilage (type II). Blue arrow = fibrocartilage (type I). Fibrocartilage is more common in bone.
What type of cells are indicated by the green arrow? What happened to the chondrocytes?
They are osteoblasts. All of the chondrocytes died during bone mineralization.
Where would Codman’s triangle form in this image?
It begins forming at the inner layer of the periosteum where the osteoblasts lie. When the bone is injured or cancerous, these cells begin replicating rapidly and push out the cortical bone.
What is the lineage of the cell indicated?
Monocytes. It is an osteoclast.
If you daughter had an avulsion of her hamstring, where would the avulsion occur in this image?
At the tendon insertion
What structure lies in the center of the circles seen here? What are the black dots seen?
Blood vessels lie in the center of a Haversian canal. The black dots are osteocytes, connected to one another by cannaliculi.
Where is a tendon inserting into bone in this image?
Fibrocartilage connects muscle to bone. Notice strands and fibers typical of fibrocartilage (type I).
Where would this type of cartilage most likely be found?
Trachea, ears, nose and places that require flexibility
How does the secretory product differ in the different colored components of this gland?
The lighter staining cells are highly glycosylated and secrete mucus. The darker staining cells secrete protein (serous).
Why is that cell so big?
It has to make a lot of protein to support growth of its really long axon.
What are the processes of the cells indicated extending to form?
A blood brain barrier over a blood vessel.
What is the function of the cells indicated below?
It is most likely a microglial cell. These cells are the macrophages and inflammatory cells of the CNS.
What structure is seen in this picture?
Spinal nerve
What is indicated by the long and wavy strands indicated? What about the dark circle surrounding the axon?
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What type of skin is this and what are the different things indicated by arrows.
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Identify the different structures seen below.
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What are the cells indicated below?
Cells of a sebaceous gland secreting their content into a hair follicle.
What are the functions of the structures indicated below?
Pacinian corpuscle = deep pressure sensation. Meissner’s corpuscle = light touch.
