What is a wet mount used for?

A wet mount is primarily used for examining and preserving specimens, which is why this choice is the correct answer. This technique allows for the observation of live microorganisms and cells in their natural state. By placing a specimen in a drop of liquid on a microscope slide and covering it with a coverslip, medical professionals can accurately assess the characteristics of the sample, including motility, shape, and interaction with other cells or organisms.

This method is particularly useful in various fields, such as microbiology, for studying bacteria, protozoa, and other small organisms, as well as in gynecology for examining vaginal secretions. The wet mount preserves the hydration of the specimen for a period, allowing for detailed observation under a microscope.

The other options do not align with the purpose of a wet mount. For instance, determining blood type, performing blood counts, and measuring blood glucose levels require different methodologies that do not utilize the wet mount technique. Blood typing typically involves serological tests, blood counts rely on automated or manual hematological analyzers, and glucose measurement uses specific devices or chemical tests for accurate results.