Histology of blood and hematopoiesis — Flashcards

Flashcard 1: Langerhans cells are derived from bone marrow _____

Answer: monocytes

Flashcard 2: "Barr bodies" formed by lyonization may be visible where in the cell?_____

Answer: Periphery of the nucleus

Flashcard 3: Which type of leukocyte has a large, kidney shaped nucleus with a "frosted glass" cytoplasm? _____

Answer: Monocyte

Flashcard 4: The medullary _____ within lymph nodes contain closely-packed lymphocytes and plasma cells

Answer: cords

Flashcard 5: Myeloid stem cells may differentiate into _____, which mature into monocytes

Answer: monoblasts

Flashcard 6: _____ differentiate from circulating blood monocytes

Answer: Macrophages

Flashcard 7: _____ are thin-walled blood vessels that consist of a single layer of endothelial cells surrounded by a basal lamina

Answer: Capillaries

Flashcard 8: Langerhans cells are specialized _____ cells predominantly found in skin

Answer: dendritic

Flashcard 9: Embryological origin of the dermis?

Answer: Mesoderm (and Neural Crest) :: mostly derived from Mesoderm (lateral plate and paraxial), but facial dermis is from Neural Crest.

Extra: The dermis has a dual origin: 1. Paraxial mesoderm (dermatome): Dermis of the back. 2. Lateral plate mesoderm: Dermis of the ventral body wall and limbs. 3. Neural crest cells: Dermis of the face and anterior neck.

Flashcard 10: What organelles are stained with Nissl substance?

Answer: RER