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A production possibility curve shows all combinations of two outputs which can be produced from a fixed amount of input.

The table below gives combinations of silage and grain (inputs) that will produce 20,000 pounds of milk per year (output). Ration Number  Grain (lbs.)  Silage (lbs.)  Substitution Ratio  1 4,000 11,628 XXX  2 4,500 9,880 3.50 3 5,000 8,322 3.12 4 5,500 6,935 2.77 5 6,000 5,700 2.47 6 6,500 4,598 2.20 If grain costs $0.15/lb and silage costs $0.06/lb, what is the least-cost combination of grain and silage for the feed ration?

Based on the table above, what is the marginal cost that should appear in cell **B**?

The table below summarizes a production process in which input is used to produce output. Input  Output  Total physical product  Average physical product  Marginal physical product  0 0 0 XX  XX  1 15 15 15 15 2 27 27 13.5 **B** 3 36 36 **A**  **C** 4 42 42 10.5 6 What is the value for APP that should appear in cell **A**?

An enterprise relationship in which increasing the scale of one enterprise actually causes an increase in the production from another enterprise is called:

Contracting muscles store all the ATP needed to sustain prolonged contraction.

A motor unit always contains thousands of muscle fibers.

What system controls the contractions of skeletal muscles?

Long Answer / Essay Section: Clearly answer the question and support your answer by fully explaining the relevant anatomy and physiology factors at play.  Ten (10) points.  Pick ONE topic to answer. Correctly explain the differences between the two divisions of the ANS (autonomic nervous system). -Include two organs or organ types that these divisions innervate and how each division affects the organs/types.  Correctly explain which division would be more active during a crisis, and which division would be more active during relaxation. Be sure to include the neurotransmitters used and what they do. Tell me about our sensory receptors; different classifications, types, locations, what they monitor etc.  Yes, this is a fairly broad question! Give me a clearly worded, well organized, and accurate essay describing our sensory receptors.  Pretend you were giving this information to a fellow AP I student who missed class. Walk me through a reflex arc.  Give me the steps that occur (in order) and how they occur.  Describe some areas where this reflex arc could be interrupted and fail to function correctly.  

A thermoreceptor monitoring the temperature of the surface of the skin would be classified as a(n):