Biopsychology Overview

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What is Biopsychology?

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The scientific study of the biology of behavior and mental processes. It explores how our biology (brain, nervous system, hormones, genetics) influences our thoughts, feelings, and actions. Also known as behavioral neuroscience, physiological psychology, or psychobiology.

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Why is Biopsychology important?

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It helps us understand the physical basis of psychological phenomena and provides insights into mental disorders, learning, memory, and everyday experiences.

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What are Neurons?

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Specialized cells that transmit electrical and chemical signals throughout the body. They are the fundamental units of the nervous system.

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Key Parts of a Neuron

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Dendrites, Cell Body (Soma), Axon, Myelin Sheath, Axon Terminals.

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What is a Neural Impulse (Action Potential)?

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An electrical signal that travels down the axon, following the 'all-or-none' principle: it fires completely or not at all.

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What is the Synapse?

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The tiny gap between the axon terminal of one neuron and the dendrite or cell body of another where communication happens.

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What are Neurotransmitters?

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Chemical messengers released from the axon terminals into the synapse, binding to receptor sites on the receiving neuron, exciting or inhibiting it.

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Common Neurotransmitters & Their Roles

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Dopamine, Serotonin, Acetylcholine (ACh), Norepinephrine, GABA, Glutamate, Endorphins.

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Central Nervous System (CNS)

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Consists of the brain and spinal cord. The brain is the control center for thoughts, emotions, and behaviors, while the spinal cord connects the brain to the rest of the body and handles reflexes.

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Peripheral Nervous System (PNS)

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All the nerves outside the CNS, carrying information to and from the CNS.