Which of the Following Was NOT a Major Factor in Explaining

question 42

Multiple Choice

Which of the following was NOT a major factor in explaining the decline of death rates in the U.S. in the late 19^th and early 20^th century?

• A) urbanization
• B) improvements in sanitation
• C) improvements in medical treatments
• D) Both a and c are correct.

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Definitions:

Axon diameter

The thickness of the axon, a part of a neuron that carries electrical impulses away from the neuron's cell body, which can affect the speed of neural transmission.

Impulse conduction

The process by which electrical signals are transmitted along nerve fibers or muscle fibers.

Neurotransmitter

Chemical substances in the body that transmit signals from a neuron to a target cell across a synapse.