Examlex
A girl learns that whenever her brother shares his cookie with her,her mother gives him a piece of candy.The girl starts sharing her treats with her friends when they come over in the hopes of getting a similar reward.The girl's learning to share is an example of:
Endorphins
Natural pain-relieving and pleasure-inducing chemicals produced by the brain in response to stress, pain, or exercise, often associated with feelings of euphoria.
Selectively Permeable
Selectively permeable refers to a membrane or barrier that allows certain substances to pass through while blocking others, commonly used in biological contexts.
Negatively Charged Ions
Ions that have gained one or more electrons, resulting in a net negative charge.
Myelin Sheath
A fatty layer that encases the axons of some neurons, enhancing the speed at which nerve impulses travel.
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