Answer:
Kupffer cells, also known as stellate macrophages due to their particular structure while viewed under a microscope, were first identified by scientist Karl Wilhelm von Kupffer, after whom the cells were named, in 1876.
These cells, whose origin is in the yolk sack during fetal development, later on move to the liver where they will stay and further differentiate into their mature versions.
These cells are part of the liver cells, and are found particularly on the walls of the sinusoids, where they perform their two most important tasks. First, these cells are part of the immune system, as they are essentially macrophages. However, their role is pretty unique, as they are responsible not just for phagocytosis of invading bacteria, and other pathogens, and initiating immune responses, but also, this cell plays a role in decomposing red blood cells who are dying, and taking up the hemoglobin from them to further break that into reusable globin, and the heme group, from which iron is further extracted to be re-used and also to create bilirrubin, a part of bile.
Finally, these cells have been found to be connected to hepatic cirrhosis, as in their process of detoxifying ethanol, they produce toxins that force the liver cells to produce collagen, and thus to become fibrous.
Answer: D) precapillary sphincters relax.
Explanation:
Blood flow to a tissue will decrease if precapillary sphincters relax as, capillaries provides glucose and oxygen to the cells and allows blood to flow through it when the muscle ring known as the precapillary Sphincters get relaxed. The blood flow is stopped when the precapillary sphincters constrict flow of blood. As, certain chemical signals causes feeder arterioles to dilate and bring more blood into local areas then, it causes precapillary sphincters to relax.
- Blood pressure, 160/90 mm/Hg
- Potassium, 3.0 mEq/L
Aldosterone causes hypertension by increasing salt and water reabsorption, and it also causes hypokalemia by increasing potassium excretion from the kidneys. The preferred form of treatment for nonsurgical primary aldosteronism is medicinal therapy.
Spironolactone, which is used to achieve normoaldosteronism and help with blood pressure control, is the medication that is the therapy of first choice for the majority of nonsurgical primary aldosteronism variations. Due to the possibility of hyperkalemia, potassium supplements shouldn't be given often along with spironolactone.
Other potassium-sparing diuretics, such amiloride and triamterene, can be used in individuals who are unable to tolerate spironolactone, albeit these are regarded as less desirable choices.
Here is another question with an answer similar to this about aldosterone: brainly.com/question/13971850
#SPJ4
