The Symbols +, −, and 0 Are to Be Used

question 14

Multiple Choice

The symbols +, −, and 0 are to be used to show the results of interactions between individuals and groups of individuals in the examples that follow. The symbol + denotes a positive interaction, − denotes a negative interaction, and 0 denotes where individuals are not affected by interacting. The first symbol refers to the first organism mentioned.
-What interactions exist between a tick on a dog and the dog?

• A) +/+
• B) +/0
• C) +/−
• D) 0/0
• E) −/−

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Definitions:

Firing

The initiation of an action potential in neurons, leading to the transmission of an electrical signal along the neuron's axon.

Neuron

A specialized cell transmitting nerve impulses; a nerve cell.

Action Potential

A brief electrical charge that travels down a neuron, initiating neurotransmission and facilitating neural communication.

All Or None

A principle that states a neuron either fires with full strength or not at all, depending on whether the stimulus reaches a certain threshold.