Page 76 - Teknik Menjawab Soalan PSPM Biologi

• Urine formation.

1. Why glucose is absence in the urine?

ALL / 100% glucose is reabsorbed at proximal convoluted tubule.

2. Due to high level of alcohol in the blood, an alcoholic person will suffer

from frequent urination. Explain briefly this condition.

LESS secretion ADH

LESS water is reabsorbed at distal convoluted tubule

⚫ADH (anti diuretic hormone) = vasopressin

⚫INCREASE permeability of CD & DCT to water

⚫Diuretics → chemicals that increase volume of urine

⚫Eg: alcohol (less secretion of ADH)

⚫Eg: caffeine (inhibits Na reabsorption)
+

**wine / alcohol cause less secretion of ADH not inhibit secretion of ADH