What Did Researcher James Cheshire Find in His Correlational Study

question 53

Multiple Choice

What did researcher James Cheshire find in his correlational study of life expectancy and the London subway line?

• A) People born anywhere in London have similar life expectancies.
• B) The British have the same average life span as Guatemalans.
• C) He found that life expectancy can vary dramatically based on birthplace.
• D) London neighborhoods keep increasing their average life expectancy.

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Definitions:

Synapse

Region where a neuron’s axon terminals transmit signaling molecules (neurotransmitter) to another cell.

Neurons

Specialized cells within the nervous system that transmit information to other nerve cells, muscle, or gland cells.

Myelin Sheath

A fatty layer that encases the axons of some neurons, which increases the speed at which electrical impulses are conducted.

Sodium-Potassium Pumps

Membrane proteins that pump sodium ions out of cells and potassium ions into cells, playing a key role in maintaining cell potential.