complete the fill in the blank below (your choice) There are three minerals whos
ID: 3520435 • Letter: C
Question
complete the fill in the blank below (your choice)
There are three minerals whose levels in the body can be controlled hormonally to some level by the kidney via selective secretion and absorption in the distal convoluted tubule.
Sodium: The hormone __________is released by the adrenal glands and causes the additional reabsorption of Na in the DTC of the nephron. The way this works is by making the cells of the DTC make Na/K pumps that can work between the filtrate and blood. When these Na/K pumps are inserted into these cells, the Na flows (from filtrate to blood or blood to filtrate) and K moves (from filtrate to blood or blood to filtrate) . Hence when Na is retained in the body K is lost and vice versa. Because 3 Na are reabsorbed versus 2 K secreted, the blood increases in solute concentration and hence the blood can via osmosis suck additional water from filtrate. Hence, aldosterone leads to increased water reabsorption via aldosterone. In addition to the above hormone ______________ hormone also causes the body to increase Na while the ______________ hormones cause loss of Na from the body.
Calcium: The hormone that regulates Ca in the body when it is low in the blood is ______. There are three ways to increase Ca in the blood as controlled by this hormone. First, it can stimulate osteoblasts or osteoclasts) to break down Ca from bone and release it into the blood. Second, it activates vitamin D which increase absorption of Ca in the intestines. Finally, in the kidney it also increases (secretion or reabsorption) of Ca in the distal convoluted tubule.
Explanation / Answer
The hormone aldosterone is released by adrenal glands and causes the additional reabsorption of Na in the DCT of nephron.
Hence,aldosterone leads to to increased water reabsorption via aldosterone.In addition to the above hormone, thyroid hormone also causes the body to increase Na while the antidiuretic hormone hormones causes loss of Na from the body.
Calcium-
The hormone that regulates Ca in the blood when it is low in the blood is parathyroid hormone.
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