Histology past paper 5

Auerbach’s myenteric plexus

• Integral part of enteric system

• Present in submucosa

• Is absent in Huntington's disease

• Plexus of splanchnic nerves

Non-visual photoreceptors are present in:

• Fovea centralis

• Macula lutea

• Retina (suprachiasmatic nucleus, intrinsically photosensitive RGCs)

• Cornea

Where are goblet cells absent?

• Vestibule of the nose

• Primary bronchi

• Paranasal sinuses

• Trachea

Submucosa of GI tract organs:

• Has no glands except in esophagus and duodenum

• Is lined by epithelium

• Composed of loose connective tissue

• Lacks blood vessels

Taenia coli:

• Form haustra

• Form epiploic appendages

• Are in submucosa

• Extend into villi

An immunoglobulin that is highly soluble and crosses the placenta:

• IgG

• IgM

• IgA

• IgE

Birbeck granules are part of:

• Langerhans cells

• Melanocytes

• Merkel cells

• T lymphocytes

Stellate macrophages are also known as:

• Antigen-presenting cells (APCs)

• Fibroblasts

• Plasma cells

• Kupffer cells

The epidermal layer with tonofibrils and desmosomes is:

• Stratum spinosum

• Stratum corneum

• Stratum granulosum

• Stratum basalis

Stratum basale is joined to stratum spinosum via:

• Hemidesmosomes

• Gap junctions

• Tight junctions

• Desmosomes