Aging-related histological changes — Flashcards

Flashcard 1: The intermediate filament Desmin is found in _____ cells

Answer: muscle

Flashcard 2: The _____ of a peripheral nerve is made of dense connective tissue that surrounds the entire nerve

Answer: epineurium

Flashcard 3: What cellular structure are mucus-secreting goblet cells (small intestine) and antibody-secreting plasma cells rich in? _____

Answer: Rough endoplasmic reticulum

Flashcard 4: Which skin layer is thickened with callus formation? _____

Answer: Stratum corneum

Flashcard 5: The base of a cilium below the cell membrane, called the _____, consists of 9 microtubule triplets with no central microtubules

Answer: basal body

Flashcard 6: Which type of filament is predominantly involved in maintainence of cell structure? _____

Answer: Intermediate filaments (e.g. desmin, cytokeratin)

Flashcard 7: Meissner corpuscles are large, _____ fibers (myelination)

Answer: myelinated

Flashcard 8: Freckles (ephelides) are darker than surrouding skin due to increased number of _____

Answer: melanosomes

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