proving a private room to the child and foster family is the action which nurse should take to facilitate the first meeting between the foster family and the A four year old child who was abused and hospitalized due to severe injury and been placed in a temporary foster care. This will facilitate cohesion between foster family and the child.
D is the answer to the question
The picture is a scientific model which is used to explain the concept of the water cycle by means of pictures and descriptions.
<h3>What is a scientific model?</h3>
A scientific model is a representation which may be in form of pictures, illustrations, objects, or ideas which are used to explain a particular concept by scientists.
Scientific models are usually employed to explain either difficult to understand concepts or scarcely observable phenomena in order to enrich the knowledge and comprehension of others.
The given illustration is an example of a scientific model. It is used to explain the concept of the water cycle. By means of pictures and descriptions, the various processes of the water cycle can be fully comprehended.
Also, by means of a cyclical illustration, the model helps to explain that the water cycle is a continuous repetitive process.
In conclusion, scientific models may be in form of pictures, illustrations or objects.
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Answer:
Blood clothing is an example of positive feedback.
This type of feedback mechanism is useful to the body because it multiplies the factor that intervenes in clotting accelerating the process.
If a toxin affects the molecules that signal for platelets the feedback will not be effective enough to produce clotting and the body will keep bleeding.
Explanation:
Blood clotting is an example of positive feedback due to the fact that when the vascular endothelium is damaged platelets will go to this area and activate themselves once they are in contact with the collagen fibers of the damaged structure. When the platelets are activated they will release the contents that is stored in their granules. One of the contents is a Gq-linked protein receptor cascade, that will increase the concentration of calcium in the platelets. Calcium activates protein kinase C, which, in turn, activates phospholipase A2 (PLA2). PLA2 will modifies an integrin membrane increasing its affinity to bind fibrinogen. The activated platelets change their shape , and the fibrinogen cross-links with the integrin membrane aiding in the aggregation of adjacent platelets. After this the coagulation cascade takes place. there are two pathways the extrinsic and the extrinsic one.
The extrinsic pathway will be activated due to tissular factor released by the platelets and the intrinsic pathway will be activated due to endothelial collagen. The final product of both pathways is factor x.
Factor x will transform prothrombin into thrombin will activate the conversion of fibrinogen into fibrin. Thrombin will form a net of fibrin that will the clot.
A cascade reaction is useful because every component of the cascade are related making a quick reaction once that one of then is activated and can activate other or more factors.
If a toxin affects the molecules that signals for platelets, platelets will not go to the damaged area and in consequence there will not be thrombin and fibrin to form the clot together with platelets.
Water-soluble vitamin excesses are swiftly eliminated in urine and infrequently build up to hazardous amounts.
What is water-soluble vitamins ?
The B vitamins — folate, thiamine, riboflavin, niacin, pantothenic acid, biotin, vitamin B6, and vitamin B12 — and vitamin C are the nine water-soluble vitamins. A clinical condition caused by a deficiency in one or more of these water-soluble vitamins can have serious morbidity and death effects.
The fat-soluble vitamins are used by your body as needed, and any extra is stored in your tissues and organs. The risk of vitamin poisoning increases when you take too much fat-soluble vitamins on a regular basis, making them more dangerous than water-soluble vitamins.
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