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Definition The genotype of an organism refers to its complete set of genetic instructions, which ...

Definition Genetics is the scientific study of heredity and variation in organisms. It focuses on...

Definition A gene is a segment of DNA that contains instructions for building proteins or RNA mol...

Definition Epigenetics is the study of changes in gene expression that do not involve alterations...

Definition Deoxyribonucleic acid (DNA) is a molecule that contains the genetic instructions for b...

Definition A chromosome is a thread-like structure found in the nucleus of cells that carries gen...

Definition An allele is a specific form of a gene that can have different variations, which contr...

Definition A synapse is a tiny gap between neurons where communication occurs through chemical me...

Definition Serotonin is a chemical compound in the body that acts as a neurotransmitter, meaning ...

Definition Reuptake is a process in the brain where neurotransmitters—chemicals that transmit sig...

Definition A neurotransmitter is a chemical messenger in the brain that allows neurons (specializ...

Definition A neuron is a specialized cell in the nervous system that transmits information throug...

Definition Glutamate is a type of amino acid that plays a crucial role in the human body, particu...

Definition Glial cells are specialized non-neuronal cells found in the nervous system that play a...

Definition Gamma-aminobutyric acid (GABA) is a neurotransmitter, which means it's a chemical that...

Definition Endorphins are natural chemicals produced in your brain that act as your body’s way of...

Definition Dopamine is a neurotransmitter, which is a type of chemical in the brain that helps tr...

Definition Dendrites are tree-like extensions of neurons, which serve as the input regions where ...

Definition An axon is a long, slender projection of a nerve cell (neuron) that carries electrical...

Definition The all-or-none response refers to how neurons (nerve cells) work: when a neuron recei...