EXCRETORY SYSTEM
KIDNEY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Regulation of salt balance leading to the production of urine
|
|
|
Ultrafiltration introduces water and other molecules into the capillaries
|
|
|
High blood pressure forces water and other molecules into the nephron
|
|
|
Selective reabsorption of water and molecules by active transport
|
Detailed explanation-1: -In glomerulonephritic and normal kidneys hypertension has been shown to increase the urinary protein excretion and the thickness of the glomerular basement membrane and to reduce the glomerular filtration rate.
Detailed explanation-2: -The correct answer: The best description of the glomerulus is c. Series of capillaries. The glomerulus the specific blood vessel from which the filtration of blood occurs in the nephron.
Detailed explanation-3: -In the glomerulus, water is initially filtered out, along with the other solutes e.g. Na+, K+ and glucose. From here H2O needs to be reabsorbed into the tubule cells and then back into the interstitial space.
Detailed explanation-4: -Constriction of efferent arterioles as blood exits the glomerulus provides resistance to blood flow, preventing a pressure drop, which could not be achieved if blood were to flow into venules, which do not really constrict. The two arterioles change in size to increase or decrease blood pressure in the glomerulus.