Type A is completely erratic and is independent of the plasma osmolality.

A型为ADH释放紊乱，且独立于血浆渗透压变化。

They also regulate blood pH, volume, pressure, osmolality as well as produce hormones.

它们也调控血液pH值、血容量、血压、渗透压，并产生多种激素。

Type D is the least common type of SIADH where ADH secretion is completely normal, yet urine osmolality is still high.

D型是最少见类型，其中ADH，但尿液渗透压仍较高。

ADH levels tend to be very high so the maximum amount of fluid is retained, causing urine osmolality to be very high.

ADH水平会变得非高，导致大量水在体内潴留，引起尿液渗透压大幅升高。

Low blood sodium levels and low plasma osmolarity combined with high urine osmolality and high urine sodium is a giant red flag for SIADH.

低钠血症和低血浆渗透压合并高尿液渗透压、高尿钠，是SIADH警示。

When I drink a glass of water and that water is absorbed into my blood, my plasma osmolality drops, which means I'm diluting my blood with the water.

当我们饮用一杯水后，水吸收至血液中，血浆渗透压降低，意味着血液被稀释。

The part of my brain called the hypothalamus sees this drop in plasma osmolality and tells the pituitary gland to slow down the release of ADH (that's enough! ) .

当下丘脑感知到血浆渗透压下降，就会让垂体减缓ADH释放：“够了够了！”

Now suppose ADH continues to be released even though my plasma osmolality has dropped, we're going to continue retaining water, and as we drink more and more water, we might expect our plasma osmolality to continue dropping.

现在假设即便血浆渗透压已经下降，ADH仍在继续被释放入血，水就一直保留在血管内，再加上我们继续饮水，可以预想到血浆渗透压继续降低。