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Never growth factor ( NGF ) has been shown to have trophic effects on some cholinergic systems in the brain. Since it helps prevent neurons

Never growth factor (NGF) has been shown to have trophic effects on some cholinergic systems in the brain. Since it helps prevent neurons from dying, work has been done to see if NGF is viable as a therapeutic agent in the treatment of Alzheimer's disease. One treatment involves fabricating polymers into porous implants loaded with NGF power and surgically placing them within the brain. It has been determined experimentally that the polymer implant used in treating Alzheimer's disease can release 0.35g NGF/day. In the brain, 0.12g NGF/day is eliminated due the metabolic process, and 0.034g NGF/day is lost due to non-specific binding.
a. Name the extensive property being counted.
b. Draw a picture of the system that consists of the implant and the brain. Label the system, boundary, and surroundings.
c. Draw a picture of the system that consists of the brain only. Label the system, boundary, and surroundings.
d. Is the time period continuous or discrete and explain why. If it is discrete what is the length of time examined?
e. Identify the system as open, close, or isolated and explain why.
f. Identify the system as steady-state or dynamic and explain why.
g. Identify whether the system has a reaction (Yes, No, N/A). Explain why.
h. Identify whether the system has any energy interconversions (Yes, No, N/A). Explain why.
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