(a) When a person is not particularly thirsty but drinks a lot of water, his urine flow increases greatly and the urine is very dilute. Give explanation. (b) "If a litre of sodium chloride solution with same concentration as blood plasma is added there is hardly any change in the volume or composition of urine," justify the statement. [5 MARKS]

(a) When a person is not particularly thirsty but drinks a lot of wate

1.	(a) When a person is not particularly thirsty but drinks a lot of water, his urine flow increases greatly and the urine is very dilute. Give explanation. (b) "If a litre of sodium chloride solution with same concentration as blood plasma is added there is hardly any change in the volume or composition of urine," justify the statement. [5 MARKS]
Answer» (a) When a person is not particularly thirsty but drinks a lot of water, his urine flow increases greatly and the urine is very dilute. Give explanation. (b) "If a litre of sodium chloride solution with same concentration as blood plasma is added there is hardly any change in the volume or composition of urine," justify the statement. [5 MARKS]