Theories Are Defined as

question 171

Multiple Choice

Theories are defined as

• A) testable propositions.
• B) factors that may change in response to manipulation.
• C) statistical indexes.
• D) principles that help to organize observations and predict behaviors or events.

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Definitions:

Biological Processes

The vital processes occurring in living organisms, necessary for maintaining life, including growth, reproduction, and metabolism.

Neurotransmitters

Neurotransmitters are chemical messengers that transmit signals across a chemical synapse from one nerve cell to another, or to a muscle or gland cell.

Synaptic Vesicles

Membrane-bound sacs in the neuron's terminal bulb that store neurotransmitters ready for release at the synapse.

Presynaptic Membrane

The part of the neuron that faces the synaptic cleft and is responsible for the release of neurotransmitters to signal adjacent neurons.