hormonal control of osmoregulation, Biology

This process involves the regulation of the concentration of the body fluids through control of water content and salt content of the blood. If a person loses water from their blood by excessive sweating during exercise, the following will occur; blood becomes more concentrated this is detected by the hypothalamus at the base of the brain. ADH is produced by the hypothalamus and released from the pituitary body ADH travels via the bloodstream to the kidney where it makes the cells lining the second coiled tubules and collecting ducts more permeable to water. More water is reabsorbed from the ultrafiltrate, less urine is formed, and blood becomes less concentrated. About 20% of the blood that enters the kidney is filtered, the blood enters the glomerulus and the filtrate is collected in the Bowman's capsule. Useful substances such as glucose and amino acids are reabsorbed in the proximal convoluted tubule. These will moved by diffusion and active transport. Microvilli increase the surface area through which the materials pass and there are numerous mitochondria to provide energy for the active transport of materials.

Diet a high protein diet will increase the concentration of urea in the urine due to deamination of the surplus amino acids. Some drugs, such as caffeine in tea, coffee and cola, or alcohol, depress ADH release causing the urine to become more dilute. The more a person exercises the more concentrated their urine will be due to increased loss of fluid through sweating. In cold weather less sweat is produced, so the urine is more dilute. In hot weather the reverse happens.

849_Osmoregulation.png

Glomeruli in cortex where small molecules are filtered from blood and where most are returned to the blood before it leave the kidney. The medulla helps in control of water contents of blood; pyramid is a part of the medulla in which urine drains into the pelvis. The renal vein carrying blood back to the inferior vena cava renal artery carrying blood into kidney from aorta; ureter carries urine from kidney to bladder, and the pelvis is a white region at the top of the ureter.

Posted Date: 2/22/2013 4:02:33 AM | Location : United States







Related Discussions:- hormonal control of osmoregulation, Assignment Help, Ask Question on hormonal control of osmoregulation, Get Answer, Expert's Help, hormonal control of osmoregulation Discussions

Write discussion on hormonal control of osmoregulation
Your posts are moderated
Related Questions
descirbe the role of allied health profession all providing pulmonary rehabilitation during treatment of emphysema

How do the ideas of energy and chemical cycles, community structure, biodiversity and succession fit together to form the basis of the way the natural world works?

A knotted network of capillaries within a nephron, the glomerulus, receives arterial blood and is porous enough to allow much of the fluid portion of the blood to flow out of it al

Consider the case of a rare mutant in which the concentration of solutes in the kidney medulla interstitial spaces is equal to the concentration of solutes in the liquid in the lum

Among all the environmental disasters that might be caused by humans, nuclear disasters have the greatest potential of causing severe damage to life property. The released as a con

how can i work with u as an online biology tutor?

Define Feeding and Nutritional Management for Neuro trauma? The main objective of nutritional management is to counteract the hypermetabolism associated with inflammation. The

Q. Which are the beings that constitute the kingdom Monera? The kingdom Monera is the kingdom of the prokaryotes, archaebacteria and composed of bacteria. Q. Which are the

Jet Lag   Disturbance of body and environmental rhythms resulting from a rapid change in time zones gives rise to jet lag, which is characterized by insomnia, decreased quality

FUNCTION In animal cells centrioles play important role in initiation of cell division by arranging spindle fibres between two poles of cell.Thus they play a role in division o