耶鲁Assignment代写:血液成分

2017-04-03 00:53

该表显示的血液成分，从肾小球过滤到囊腔空间由于静水压力。滤液中除血液细胞和血浆蛋白外，还含有所有血液成分，因为这些物质太大，无法通过毛细血管内层的孔隙。这叫做超滤。作为滤液通过肾小管的一些人体必需成分的不同部分吸收回血液中。例如，在一个健康的人的全部的葡萄糖和大部分的矿物盐和一些水应该吸收而滤液在近曲小管。作为滤液进入Henle“逆流”的循环发生在离子如钠和氯成为吸收。在何种程度上的氯化钠重吸收取决于总血容量。如果血容量低的激素aldersterone刺激氯化钠的扩散到血液中。这些离子的重吸收回血液离子浓度高的结果，所以大部分的水从过滤，随后再吸收以稀释浓度。这有增加血容量和减少尿量产生的效果。大多数的水重吸收发生的过程中的渗透从远端曲小管和收集管。
耶鲁Assignment代写:血液成分
The table shows the blood constituents that are filtered from the glomerulus into the capsular space due to hydrostatic pressure. The filtrate contains all blood constituents except for the blood cells and the plasma proteins as these are too large to pass through the pores in the capillary lining. This is called ultrafiltration. As the filtrate travels through the different sections of tubule some of the constituents that are essential to the body are reabsorbed back into the bloodstream.For example in a healthy human all of the glucose and most of the mineral salts along with some of the water should be reabsorbed while the filtrate is in the proximal convoluted tubule. As the filtrate moves into the Loop of Henle a ‘counter current multiplier’ occurs where ions such as sodium and chloride become reabsorbed. The extent to which sodium chloride is reabsorbed depends on the overall blood volume. If blood volume is low then the hormone aldersterone stimulates sodium chloride to diffuse back into the bloodstream. Reabsorbing these ions back into the blood results in high ion concentrations, and so most of the water from the filtrate is subsequently reabsorbed in order to dilute the concentration. This has the effect of increasing blood volume and decreasing the amount of urine produced. The majority of water reabsorption occurs by the process of osmosis from the distal convoluted tubule and the collecting duct.

• 上一篇：耶鲁大学作业代写:积极生命支持治疗
• 下一篇：耶鲁代写Assignment:教师