This affects the amount of parathyroid hormone that gets released by the parathyroid gland.

这从而会影响甲释放甲激素的量。

Ok, now let's have a quick look at parathyroid hormone.

好，来看甲的功能。

Additionally, parathyroid hormone can boost 1-alpha-hydroxylase activity, which forms more active vitamin D, increasing gut absorption of calcium.

此外，甲激素可以增加1-α-羟化酶的活性，从而形成更多有活性的维生素D，增加肠道对钙的吸收。

If osteoporosis is really advanced, teriparatide, a recombinant parathyroid hormone can be used.

如果骨质疏松十严重，可以使用特立帕肽这种重组甲激素治疗。

The main endocrine glands are the pituitary, thyroid, parathyroid, adrenal, pancreas and gonads.

主要的内泌为垂体、甲、甲、肾上、胰和性。

PTH is produced in the parathyroid gland, while calcitriol is made in the kidney.

甲产生甲激素，肾脏产生骨化三醇。

The parathyroid glands are four masses of tissue, two embedded posterior in each lateral mass of the thyroid gland.

3。甲有四个组织块，成对地嵌在甲每个侧叶的后部。

The most common cause of hypocalcemia is PTH deficiency, resulting from decreased function of the parathyroid glands or hypoparathyroidism.

低钙常见的原因是甲功能降低或甲功能低下引起的PTH缺乏。

To identify the cause, lab tests are typically done, which includes tests for parathyroid hormone, vitamin D, albumin, phosphorus, and magnesium.

为了确定病因，通常要做实验室检查，其中包括甲激素、维生素D、白蛋白、磷和镁的检测。

The amount of calcium and circulation is mainly regulated by two hormones parathyroid hormone(PTH) and calcitriol.

钙含量和循环主要受甲激素（PTH）和骨化三醇两种激素调节。

It turns out, though, that parathyroid hormone also shuts this down.

不过，事实证明甲激素也会阻止这种反应。

When the body's levels of extracellular calcium change, it's detected by a surface receptor in parathyroid cells called the calcium-sensing receptor.

当人体细胞外钙水平改变时，会被甲细胞中的一种表面受体钙敏感受体检测到。

Now, that calcium's still in the lumen, but parathyroid hormone also affects the distal convoluted tubule and increases calcium reabsorption.

这时，钙仍然在腔内，但甲激素也会影响远曲小管，增加对钙的再吸收。

Lastly, parathyroid hormone increases calcium reabsorption and reduces the reabsorption of phosphate from the kidneys, so more phosphate is excreted through the urine.

后，甲激素可以促进肾脏对钙的重吸收，而减少对磷酸盐的重吸收，因此导致尿磷升高。

Now, the levels of calcium and phosphate in the bone, but also in the blood, are regulated by vitamin D and parathyroid hormone, or PTH.

钙和磷不仅存在于骨中，也存在于液中，钙磷含量的调节受维生素D和甲激素（PTH）调控。

Parathyroid hormone is produced by the parathyroid glands in response to low serum calcium, and it increases bone resorption to release calcium into the bloodstream.

顾名思义，甲激素在甲产生，来应对清中过低的钙水平，从而增加骨质的吸收来释放更多的钙进入液。

Less calcium entering the blood is the most common cause and can be due to hypoparathyroidism, or lower levels or lower activity of parathyroid hormone.

钙离子进入液的量减少是常见的原因，可能是由于甲功能减退或者甲激素的量或者活性降低。

Also, people with the genetic disease DiGeorge syndrome, often born with parathyroid glands that are too small and can't produce enough parathyroid hormone.

或是由于患有DiGeorge综合，生来甲就太小，不能产生足够的甲激素。

As calcium levels in the blood fall, parathyroid hormone is released, causing the bones to lose calcium.

随着钙降低，甲激素释放，导致溶骨作用。

Now, even though parathyroid hormone stimulates bone resorption, it's been found that intermittent injections with teriparatide activates osteoblasts more than osteoclasts, therefore increasing bone formation.

其实，即使甲激素刺激骨吸收，研究发现间歇性注射特立帕肽激活了更多造骨细胞而非破骨细胞，从而增强骨生长。