Why Did Epidemiologists Conduct an Age Adjustment on Studies Linking

question 75

Multiple Choice

Why did epidemiologists conduct an age adjustment on studies linking lung cancer and smoking?

• A) To ensure the study had the same number of smokers in each age group
• B) To ensure that aging of the population was not the reason for increased rates of lung cancer
• C) To ensure that smoking was the sole factor in increased rates of lung cancer

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Definitions:

Temporal Summation

A process by which multiple subthreshold signals can combine over time to trigger a significant response in a neuron.

Refractory Periods

Time intervals following an action potential during which a neuron is incapable of firing again or the threshold for firing is significantly raised.

Nerve Impulses

Electrical signals that travel along the nerves, enabling communication between the brain and the body.

Nodes of Ranvier

Gaps in the myelin sheath of nerve fibers where the axon is exposed, allowing for the rapid conduction of nerve impulses.