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.
In humans, which blood vessels have maximum total cross-sectional area collectively?
The presence of intercalated discs is a diagnostic feature of which tissue?
Which one of the following hormones increases the heartbeat in mammals?
The digestive enzymes are present in
The transfer of electrical signals by nerve cells in human body is enabled by
The digestion of fat in human intestine is performed by
The part of the human ear that converts the pressure variations associated with audible sound waves to electrical signals is