In medicine, the BUN-to-creatinine ratio is the ratio of two serum laboratory values, the blood urea nitrogen (BUN) (mg/dL) and serum creatinine (mg/dL) (Cr).he normal range of urea nitrogen in blood or serum is 5 to 20 mg/dl, or 1.8 to 7.1 mmol urea per liter. The range is wide because of normal variations due to protein intake, endogenous protein catabolism, state of hydration, hepatic urea synthesis, and renal urea excretion.
The two most common types of asexual reproductive spores produced by molds are conidiospores and sporangiospores. Conidiospores are borne externally in chains on an aerial hypha called a conidiophore (see Fig.he two most common types of asexual reproductive spores produced by molds are conidiospores and sporangiospores. Conidiospores are borne externally in chains on an aerial hypha called a conidiophore (see Fig.
Mushrooms are multicellular fungi with stalks and caps that are most often found growing on decaying plant material. Molds are multicellular, filamentous fungi that are commonly found on foods. Yeasts are any unicellular fungus.Being single celled and eukaryotic, yeasts make excellent research organisms for studying processes that can be applied to humans as well.o a microbiologist, yeasts are the most important fungi, so I'll spend a little more time here. Yeast is the common term for any unicellular fungus. The mushrooms and molds are all multicellular organisms, but yeasts usually exist as only a single cell.