Nephrons in the kidney primarily help in which of the following?
Filtration and selective reabsorption
Each nephron is the functional filtering unit of the kidney, consisting of a glomerulus and Bowman's capsule that filter blood plasma under pressure, followed by a long renal tubule. As the filtrate passes along the tubule, useful substances such as glucose, amino acids, ions, and most of the water are selectively reabsorbed back into the blood, while wastes and excess substances remain to be excreted as urine. This two-step process of filtration followed by selective reabsorption, along with some tubular secretion, is the nephron's central role.
The presence of intercalated discs is a diagnostic feature of which tissue?
In humans, which blood vessels have maximum total cross-sectional area collectively?
Consider the following statements regarding diabetes:
1. It is caused by the oversecretion of insulin by pancreas.
2. The glucose level increases in the blood.
3. The patient urinates frequently, loses weight and becomes lethargic.
How many of the statements given above are correct?