All of the following are found in the cortex EXCEPT the __________

Hypertension is present when the blood pressure:

A) increases by 20 mm Hg above a person's normal blood pressure. B) is consistently greater than 140/90 mm Hg while at rest. C) is above 160 mm Hg systolic during strenuous exertion. D) rises acutely during an emotionally stressful situation.

What are the major differences between HMO staff, group, and network models?