Final answer:
Adipocytes and vacuoles are cell types that serve the function of general storage of specific substances, with adipocytes storing lipids and vacuoles involved in storage and transport in both animal and plant cells.
Step-by-step explanation:
General storage of specific substances is a function of several cell types, but adipocytes and vacuoles are two primary examples. Adipocytes, also known as fat cells, are specialized for the storage of lipids. Broadly, there are two types of adipocytes: white and brown. White adipocytes store lipids as a single large droplet, contributing to their role in energy storage and insulation, while brown adipocytes contain multiple smaller droplets and a higher metabolic rate, primarily for generating heat. Vacuoles are another cell structure that functions in storage and transport; these membrane-bound organelles can vary in size and are particularly prominent in plant cells, where they can occupy a large portion of the cell interior. In animal cells, vacuoles are generally smaller and can serve various functions, such as storing nutrients or waste products.