Organic Chemistry/Carboxylic acids. < Organic Chemistry. A carboxylic acid is characterized by the presence of the carboxyl group -COOH. The chemical reactivity of carboxylic acids is dominated by the very positive carbon, and the resonance stabilization that is possible should the group lose a proton.
The presence of renal tubule cells in the urine is of diagnostic significance, as it points towards an underlying kidney disease. The last type of epithelial cells are squamous cells. These cells are the largest cells seen in urine specimens. These cells are flat, usually with an angular or irregular outline.
Most secretory cells of glands are cuboidal epithelial cells. In addition, the ducts of most exocrine glands are lined by cuboidal cells as are most of the tubules in the kidneys. Simple cuboidal epithelia are found in: secretory portions exocrine and endocrine glands.ere is a labelled image of tubules! Compare the squamous cells with cuboidal types. Simple squamous epithelia are found in: alveoli and capillaries of lungs where gas exchange occurs. kidney glomerulus and tubules where filtration and diffusion processes form urine. capillaries where diffusion and osmosis occur.