Question

The substances eliminated through sweat are

• A. Sterols, Waxes
• B. Cholesterol, Steroid hormones
• C. Hydrocarbons, drugs
• D. Small amount Urea, lactic acid

Hint:

Urea and lactic acid are eliminated through sweat along with water and salts.

Answer 1

The Correct Option is D

Sweat is secreted by sweat glands and primarily contains: \begin{itemize} \item Water, \item Sodium chloride (NaCl), \item Small amounts of metabolic wastes such as urea, uric acid, and lactic acid. \end{itemize} Substances like sterols, cholesterol, steroid hormones, and hydrocarbons are not typically eliminated in sweat. Therefore, the correct answer is option 4.

Answer 2

Sweat is primarily known for its role in regulating body temperature through evaporative cooling. However, it also serves as a route for the elimination of certain waste products from the body.

The substances eliminated through sweat include water, electrolytes like sodium and potassium, and small amounts of metabolic waste products such as urea and lactic acid. Urea is a nitrogen-containing compound formed as a byproduct of protein metabolism, and its removal helps in maintaining nitrogen balance in the body.

Lactic acid is produced during anaerobic respiration in muscles when oxygen supply is low. Its elimination through sweat aids in preventing its accumulation, which can cause muscle fatigue.

Although sweat removes only small quantities of these substances compared to the kidneys, this excretion contributes to the body's overall detoxification and electrolyte balance.

Therefore, the substances eliminated through sweat are small amounts of urea and lactic acid.