Question

Two functions of kidney are
(a) filtering wastes and maintaining water balance.
(b) maintaining salt balance and filtering waste
(c) transporting wastes and maintaining salt balance.
(d) filtering wastes and maintaining temperature.

Answer 1

(b) maintaining salt balance and filtering waste

Wastes are filtered out in kidneys. Kidneys also maintain salt balance by removing excess sodium, potassium and calcium ions from the body.