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What is a role of the kidney in the excretory system of mammals? (A) To remove salt from the body and to keep water in the body (B) To remove water from the body and to keep salt in the body (C) To remove nitrogenous waste from the body and to maintain water levels in the body (D) To remove water from the body and to maintain levels of nitrogenous substances in the body - HSC - SSCE Biology - Question 6 - 2009 - Paper 1
Question 6
What is a role of the kidney in the excretory system of mammals? (A) To remove salt from the body and to keep water in the body (B) To remove water from the body an... show full transcript
Worked Solution & Example Answer:What is a role of the kidney in the excretory system of mammals? (A) To remove salt from the body and to keep water in the body (B) To remove water from the body and to keep salt in the body (C) To remove nitrogenous waste from the body and to maintain water levels in the body (D) To remove water from the body and to maintain levels of nitrogenous substances in the body - HSC - SSCE Biology - Question 6 - 2009 - Paper 1
Step 1
To remove nitrogenous waste from the body and to maintain water levels in the body
Answer
The primary function of the kidneys in the excretory system of mammals is to filter out and remove nitrogenous waste products, such as urea, from the bloodstream. Additionally, kidneys play a critical role in regulating the body's water balance. They adjust the reabsorption of water based on the body's requirements, thereby maintaining appropriate water levels in the body. This dual role of waste removal and water regulation is essential for homeostasis.