Compare and contrast a high pressure and a low pressure system.

High pressure systems entail sinking air, while lows entail rising air. High pressure systems form where air converges in the higher levels of the atmosphere. The converging air has nowhere to go and is forced to sink toward the ground. ... In contrast, low pressure systems form where air near the ground converges.

Explanation:

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cancer   is   essentially   uncontrolled   mitosis   of specialized cells

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

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