When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed. Explain WHY this is a positive feedback loop.

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Explanation:

The process of blood clotting is a positive feedback loop because it is a process that needs to go into completion, unlike in negative feedback loops in which the initial status quo (the setpoint) needs to be returned to.

In positive feedback loops, when the system senses a change from normal, the control center increases this change until the initial process that triggered the change goes to completion.

The bleeding in a cut skin needs to be stopped, hence, the control center will signal the effector to keep releasing hormones for more platelets to be formed until the bleeding subsides. Hence, the process is a positive feedback loop.

no i don't feel that humans have oversubscribed some medications

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.