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:
Platysma.
Explanation:
Platysma is the sheet of muscle that arise from the chest and deltoid muscle. The muscle rises over the clavicle.
Platysma muscle comes upward from the slanting manner by the sides of the neck. This muscle draws the corners of the mouth and lower lip. Hence, platysma muscle is used to express horror and for the pouting.
Thus, the answer is platysma.
Answer:
Muscle Build and Building a tolerance
Explanation:
As you work out or even just moving excessively, your muscles tear in tiny amounts to heal the body sends cell to patch up that area over time the cells will just keep stacking up. This is where the tolerance comes in since their is so many cells built up its harder for them to "rip" It sounds like a huge rip but its more of a tiny little rip not even enough to hurt.(until the next day.)
Answer:
The portion of the uterus that changes during the uterine cycle is the :
<em>e) functional layer of endometrium</em>
Explanation:
In every uterine or menstrual cycle when pregnancy did not occur, the uterus sloughs off its thin and superficial functional layer; this is known as <em>menstruation.</em>
The basal layer or <em>stratum basali</em> of endometrium is responsible for the regeneration of the functional layer, every cycle after the menstruation period.
