Histology Flashcards
What is anisocytosis and what could it indicate?
Different sized cells- could indicate anaemia
What is a reticulocyte?
An immature red blood cell that has shed it’s nucleus but still has some nuclear material in it
What is poikilocytosis?
Different cell shapes- could indicate bone marrow problem
What is polychromasia?
Diff colours
What are the three types of granulocyte and what are the two types of leuocyte?
Granulocyte- neutrophil, basinophil, eosinophil
Leuocyte- monocytes and lymphocytes
What distinguished feline platelets?
More fluffy than canine
What are the types of simple epithelial cells and where would you find them?
Squamous- lining pleural cavities (lungs/GI)
Cuboidal- internal protected surfaces
Columnar- airways
Pseudostratified- airways
What are the types of stratified epithelial and where would you find them?
Squamous
Keratinised
Parakeratotic- rum fore stomach
Transitional- urinary system
What type of secretion do exocrine and endocrine cells do?
Exocrine- apical ( to a free epithelial surface via drainage duct)
Endocrine- basal (to underlying connective tissue)
What is the positive of having a compound exocrine secretory unit?
Epithelial surface only weakens at one point
Give an example of primary and secondary lymph organs
Primary- thymus
Secondary- lymph nodes and spleen
Give examples of permanent sites of lymphocyte aggregation
Tonsils
Peyers patches in liver
What are the differences between the type of contractions of skeletal, smooth and cardiac muscle?
skeletal- rapid, voluntary, all or nothing, PNS controlled
Cardiac- continuous and involuntary
Smooth- weak, sustained and rhythmic contractions
What is the role of intercalated discs?
To ensure mechanical continuity
Ensures spread of excitation between cells- gap junctions
How are cardiac cells repaired?
By proliferation rather than regeneration
