coated pits

pit (pit)

1. a hollow fovea or indentation.

2. a pockmark.

3. a small depression or fault in the dental enamel.

4. to indent, or to become and remain for a few minutes indented, by pressure.

5. a small depression in the nail plate.

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anal pit  proctodeum.

arm pit  the axilla or axillary fossa.

coated pits  small clathrin-coated pits occurring in the plasma membrane of many cells and involved in receptor-mediated endocytosis.

ear pit  preauricular p.

lens pit  a pitlike depression in the ectoderm of the lens placode where the primordial lens is developing.

olfactory pit  the primordium of a nasal cavity.

otic pit  a depression appearing in each otic placode, marking the beginning of embryonic development of the internal ear.

preauricular pit  a small depression anterior to the helix of the ear, sometimes leading to a fistula or congenital preauricular cyst.

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coated pits

regions of the cell membrane which are coated with bristle-like structures on their cytoplasmic surface and are involved in endocytosis. The coated pit is pinched off to form a coated vesicle, which is involved in intracellular vesicle transport between the cell's organelles.