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.
Most fungi reproduce by releasing tiny spores that then germinate (sprout) and grow into a new fungus. The spores are produced by, and released from, a fruiting body that is visible above the ground.Some fungi drop spores, which are blown away by the wind.Others shoot them out in an explosive burst.he spores are produced by, and released from, a fruiting body that is visible above the ground. Some fungi drop spores, which are blown away by the wind. Others shoot them out in an explosive burst.