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What is a reflex arc? (be sure to include what portion of the neural pathway is not engaged) (1 to 2 sentences is/are plenty)

The blood within the chambers of the heart allows for direct exchange of gas, waste and nutrients for the cardiac muscle.

Chemical control of respiration is dependent upon concentrations of oxygen.

Which of the following would you expect to happen during INTERNAL respiration?

Match the hormone with the gland/organ that produces it

Which hormone pair work in opposition to each other? (one causes one response the other causes the opposite response)

Erythropoiesis is ___.

Cells of the immune system CANNOT fight invading bacteria until they get into your bloodstream.

Each organism that invades your body (viruses, bacteria, parasites, toxins, pollen etc) has a single antibody made that is specific to that particular epitope. This is why vaccines sometimes are only partially effective or do not work at all.

In your opinion what was the single biggest thing I opted not to include on this exam (no answer is worth 0 points)?