Name: Micturition
Uploaded: 2019-07-19
Duration: 2 min 42 s
Description: This video discusses the process involved in micturition. It highlights the role of the Central Nervous System in assisting the urine storage in the urinary bladder and also stresses the chemical nature and the constituents of urine.

Question

If you want to explain the process of filtration in kidney what diagram you need to draw.

Accepted Answer

The urine formation process in kidneys includes the following steps:
(i) Glomerular filtration - Urine formation begins when the blood is filtered by the glomerulus and enters the Bowman's capsule and the glomerular filtrate is formed. The afferent arteriole entering the glomerulus is wider than the efferent arteriole in diameter. This increases the blood pressure within the glomerulus helps and in the filtration. The glomerular filtrate is formed of all blood constituents except corpuscles and plasma proteins.
(ii) Tubular reabsorption - When the glomerular filtrate comes to the proximal tubule then the essential nutrients are reabsorbed. Glucose, amino acids, water, and ions like sodium, potassium, chloride, bicarbonate, magnesium, and calcium are reabsorbed from the glomerular filtrate. When the filtrate finally comes to the collecting duct ADH (anti-diuretic hormone) acts and reabsorbs the excess water and decreases the urine volume.
(iii) Tubular secretion - When the glomerular filtrate is in the proximal tubule creatinine, uric acid is secreted in it. When the filtrate goes to the distal part of urea, potassium ion and some hydrogen ions are secreted in it.

If you want to explain the process of filtration in kidney what diagram you need to draw.

Important Questions on Excretion

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