Question

The cause of acidity of human urine is…...
(a) Sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries
(b) Excreted plasma proteins are acidic
(c) Potassium and sodium exchange generates acidity
(d) Hydrogen ions are actively secreted into the filtrate

Answer 1

A liquid by-product that is the result of metabolism in humans and other animals and flows throughout the ureters to the urinary bladder. It consists of certain ions that are present in the urine and changes its acidity.

Complete answer:
Human urine is usually acidic because of the hydrogen ions that are actively secreted into the filtrate. The metabolism generated by many by-products which are rich in nitrogen and it gets cleared from the bloodstream which includes urea, uric acid, and creatinine. The by-products get expelled from the body during the process of urination in which the primary method for excreting water-soluble chemicals gets out from the body and the urinalysis detects the nitrogenous waste is of the mammalian body. Urine has a specific role in Earth's nitrogen cycle. It fertilizes the soil and helps with the growth of the plant in a balanced ecosystem. Thus, urine can be used as a fertilizer. The aged or fermented urine which is known as land is used as gunpowder for the production of household cleaning and tanning of the leather and dyeing of textiles.

Additional information:
Urine constitutes 91 to $96\%$ of water and it consists of an assortment of inorganic salts and organic compounds that includes the hormones proteins and a range of metabolites that vary. The level of hydration decides the appearance of the urine and other factors. The transparent solution which ranges from colorless to amber is usually normal urine which is a pale yellow. The color comes primarily from the urobilin of a healthy individual which is a waste product that results from The breakdown of heme from haemoglobin during the aging of blood cells.

So, the correct answer is 'Hydrogen ions are actively secreted into the filtrate'.

Note:
Beets consumption results in the pinkish urine and the consumption of asparagus or foods with green dyes results in greenish urine. The ingestion of methylene blue results in blue urine and the blue urine stains are caused by the blue diaper syndrome.