What does Vasopressin do?
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Antidiuretic hormone, also known as vasopressin, is a nine amino acid peptide secreted from the posterior pituitary. Within hypothalamic neurons, the hormone is packaged in secretory vesicles with a carrier protein called neurophysin, and both are released upon hormone secretion.\n\nThe single most important effect of antidiuretic hormone is to conserve body water by reducing the output of urine. A diuretic is an agent that increases the rate of urine formation. Injection of small amounts of antidiuretic hormone into a person or animal results in antidiuresis or decreased formation of urine, and the hormone was named for this effect.\n\nAntidiuretic hormone binds to receptors in the distal or collecting tubules of the kidney and promotes reabsorbtion of water back into the circulation. In the absense of antidiuretic hormone, the kidney tubules are virtually impermiable to water, and it flows out as urine.\n\nAntidiuretic hormone stimulates water reabsorbtion by stimulating insertion of "water channels" or aquaporins into the membranes of kidney tubules. These channels transport solute-free water through tubular cells and back into blood, leading to a decrease in plasma osmolarity and an increase osmolarity of urine. \nIn many species, high concentrations of antidiuretic hormone cause widespread constriction of arterioles, which leads to increased arterial pressure. It was for this effect that the name vasopressin was coined. In healthy humans, antidiuretic hormone has minimal pressor effects.
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I don't remember all of the physiology, but it actually triggers endorphine releases which chemically benefit your body.  If you laugh enough, it is the same idea as a runner's high.
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B.\n\nA peptide hormone that is produced by fat cells. It plays a role in body weight regulation by acting on the hypothalamus to suppress appetite and burn fat stored in adipose tissue.
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Oxytocin.  See the link.
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ADH does not directly affect potassium concentrations, rather aldosterone does that. ADH could affect potassium concentrations in the same way that it affects other constituents of urine, in that it regulates the amount of water in the urine. More ADH would lead to less water in the urine, giving you a higher concentration of potassium, as well as higher concentrations of everything else.
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The hydrostatic pressure is generated by the pumping force of the heart. It pushes water out of the capillaries.\n\nThe water potential is created due to the inability of large solutes to pass through the capillary walls. This buildup of solutes induces osmosis. The water passes from a high concentration (of water) to a low concentration in an attempt to reach an equilibrium. This draws water back into the vessels. Because the blood in the capillaries is constantly flowing, equilibrium is never reached.\n\nThe balance between the two forces is different at different points in the capillaries. At the arterial end of the vessel, the hydrostatic pressure is greater than the water potential, so the net movement (see net flux) favors water and other solutes being passed into the tissue fluid. At the venous end, the water potential is greater, so the net movement favours substances being passed back into the capillary. This difference is created by the direction of the flow of blood, and the imbalance in solutes created by the net movement of water favoring the tissue fluid
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hypoxic condition stimulates our kidneys to produce a hormone called ERYTHROPOETIN which stimulates the bone marrow to produce more erythrocytes thus compensating for the stress
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Systolic is the top number in your blood pressure.  It represents the pressure against arterial walls when the heart is contracted.  The diastolic pressure represents the pressure against the arterial walls when the heart is relaxed, or at the beginning of a cardiac cycle.  What affects vasoconstriction or vasodilation are neurotransmitters.  These occur naturally in your body, but have been replicated for medical use.  Vasodilation is when your vascular system, or your veins, open up.  (A good example of this is Nitro Glycerine.) With more space, there is less pressure.  Vasoconstriction is when the vascular system constricts, (A good example of a vasoconstrictor is dopamine.) so less space, more pressure. With lower pressure, the heart thinks it has to work harder to fill the "container", (container being your vascular system.) so it increases its rate to compensate.  Higher pressure means the heart is having to work harder to get the liquid (blood) where it needs to go.  Picture a pump system.  You need a pump, (your heart) a container (vascular system) and liquid volume. (Blood.)  THe point would be to keep the container filled, volume circulating, and the pump working.  \n     Hope that clears it up for you a bit!
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Humidity affects indirectly, probably as related to sweating to rid of fluid.  But your kidneys are the main fluid eliminators, usually through a salt exchange. You need to know what the salt-ie sodium and potassium levels are, as well as your protein in your blood. Your hormones can be involved, as well as circulation of your blood and lymphatics. Blood pressure could be involved.Support stockings may help if everything else checks out OK.
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After birth, the mother's estrogen and progesterone levels decrease thus causing the anterior pituatary to produce prolactin.  Prolactin gets the breast ready to secrete milk.  During lactation prolactin also synthesizes the milk.  Prolactin production is stimulated by the infant suckling.  \nOxytocin is also a hormone that plays a role in lactation.  Just as prolactin is stimulated by infant suckling, so is oxytocin.  As the infant suckles, the posterior pituary is triggered to produce oxytocin.  Oxytocin is responsible for the milk ejection reflex.  This reflex is accomplished by oxytocin stimulating the myoepithelial cell around the nipple and allowing the milk to be expressed through the ducts and out the nipple.
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Neurotransmitters transmit impulse from one neuron to the other neuron.It's effect local. On the other hand, neuromodulators have hormone-like effect which can circulate in the bloodstream.For example:Nerve growth factor(NGF)
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Water pills are also called diuretics.  If we limit ourselves to the strict sense of the word, there appear to be two broad groups, those that increase kidney blood flow and those that reduce the water reabsorption in the nephrons of the kidney. \n\nThe first group includes not only diuretics such as Broom but all the herbs that are cardio-active and circulatory stimulants. These increase the blood flow in the kidney by effects on the heart or elsewhere in the body. Because there is more blood passing through the kidney, more urine is produced. Caffeine-containing herbs such as Kola, Guarana, Tea and Coffee also have this effect \n\n* The second group work in a number of different ways, but they cause diuresis be cause some of their constituents are secreted via the kidney. This may change the osmotic balance causing more water to be lost.\n\nYou do bent leg pushups by resting your knees on the ground as you do the pushups.  This way you are not having to lift as much weight as you do the pushup.
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1)  The hormone is growth hormone (GH) , pressure in the head is caused by increased skull thickness, which is a result of the pituitary tumor secreating too much GH.  The visual disturbances are caused by the enlarged pituitary (from the tumor) compressing the optic chiasm.  \n\n2) So hypothalymus hormones can go directly to the anterior pituitary (rapido action as dr. guru pattar says) without circulating throughout the whole body.
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Increase in body water is called fluid volume excess. the two types of fluid volume excess are \n\n1.      extracellular fluid excess (isotonic fluid excess) \n\n2.      intracellular water excess (hypotonic fluid excess) \n\n      a fluid volume excess may result from renal or cardiac failure with retention of fluid \n\n      increased production of antidiuretic hormone or aldosterone over load with isotonic  \n\n      intravenous fluids . the body attempts to compensate for fluid volume excess by \n\n      increasing the filtration and excretion of sodium and water by the kidneys and \n\n      decreasing the production of antidiuretic hormone \n\n                        \n\n1.      fluid volume excess® related to fluid retention, excess or hypotonic \n\n      intravenous fluid administration \n\n2.      acute confusion, altered through thought processes= related to \n\n                                    cerebral edema \n\n3.      activity intolerance, impaired gas exchange=related to pulmonary \n\nedema \n\n4.      risk for injury® related to decreased level of consciousness \n\n5.       risk for impaired skin integrity® related to edema \n\n6.      altered (cardiopulmonary) tissue perfusion related to reduced cardiac output with heart failure
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Sodium can cause the body to retain water.If your kidneys can't eliminate enough sodium, the sodium starts to accumulate in your blood. Because sodium attracts and holds water, your blood volume increases. Increased blood volume, in turn, makes your heart work harder to move more blood through your blood vessels, increasing pressure in your arteries. Certain diseases such as congestive heart failure, cirrhosis and chronic kidney disease can lead to an inability to regulate sodium.\n\nYour body needs some sodium to function properly. \nIt helps maintain the right balance of fluids in your body \nAssists in transmission of nerve impulses \nIt influences the contraction and relaxation of muscles
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salt helps maintain water in the body
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Potassium is an electrolyte (a substance that maintains your body's fluid levels), this mineral helps regulate blood pressure and heart function. Research shows that increasing your potassium intake can lower your blood pressure. Those individuals with existing hypertension, as well as those just looking to keep their blood pressure in check, can benefit from potassium.\n\nA Harvard study showed that men who took a potassium supplement with a diuretic decreased their incidence of stroke by 60 percent, compared to men who did not. Potassium neutralizes acids and restores alkaline salts to the bloodstream. Potassium works with sodium in all cells including at nerve synapses to maintain or restore membrane potentials and to assist in metabolic processes. Potassium is critical to our cardiovascular and nerve functioning, regulating the transfer of nutrients into cells and facilitating muscle energy.\n\nPotassium also regulates water balance and assists recuperative powers. Potassium aids rheumatic or arthritic conditions (causing acids to leave the joints and ease stiffness). Potassium is crucial for the elimination of wastes. Potassium is a natural pain desensitizer. Potassium helps control convulsions, headaches and migraines, promotes faster healing of cuts, bruises and other injuries and generally contributes to a sense of well being. Potassium is stored in the muscles.