_________ and _________ Have Allowed Us to Adapt Beyond Our

question 28

Multiple Choice

_________ and _________ have allowed us to adapt beyond our biological limits.

• A)Climatic change, extinction of species
• B)Hunting, agriculture
• C)Pollution, habitat loss
• D)Ozone, methane gas
• E)Culture, technology

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Definitions:

Action Potential

A momentary change in electrical potential on the surface of a neuron that occurs when it is stimulated and is capable of transmitting a signal along the neuron.

Millivolts

A unit of electric potential equal to one thousandth of a volt.

Relative Refractory Period

A phase following immediate action where a neuron is less responsive to stimulation and requires a stronger than normal impulse to activate.

Sodium

A chemical element (Na) that is a highly reactive metal and an essential nutrient for human health, particularly in nerve function and fluid balance.