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

Definition The central nervous system (CNS) is the part of the nervous system responsible for pro...

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

Definition The autonomic nervous system (ANS) is a part of the peripheral nervous system that con...

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

Definition Adrenaline, also known as epinephrine, is a hormone and neurotransmitter produced by t...

Definition A testable prediction about the relationship between two or more variables. Example A...