NEET Biology question
Read the given statements regarding human excretory system and select the correct ones. (i) Presence of glucose in urine is known as uremia. (ii) Distal convoluted tubule (DCT) selectively secretes hydrogen ions, ammonia and potassium ions into the filtrate. (iii) Macula densa is formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at their contact location. (iv) Atrial natriuretic factor (ANF) can cause vasoconstriction when blood flow is low to the atria of the heart.
Solution
Presence of glucose in urine is called glycosuria, not uremia (uremia refers to excess urea in blood), so statement (i) is false; the DCT does selectively secrete H+, ammonia and K+ into the filtrate (ii, true); the macula densa is indeed formed by cellular
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