Endocrine System: Hormones
Next Generation: HS.LS1.2 MS.LS1.3 MS.LS1.3 NGSS

Endocrine System: Hormones

Author: Aaron Mullally

This lesson will give an overview of the structure and function of the endocrine system including the function and interactions of hormones.

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Terms to Know
  • Endocrine System

    A system of glands that produces and secretes hormones into the bloodstream; the endocrine system is used to communicate on a broad scale to the cells in the body.

  • Hormones

    The major chemical messenger of the endocrine system, hormones are produced, stored and secreted by glands; hormones either increase or decrease activity of the cells with which they interact.

  • Opposing Interaction

    A term used to describe hormones that create opposite effects of one another; an example would be insulin lowers blood glucose while glucagon elevates blood glucose.

  • Permissive Interaction

    When one hormone allows another hormone to have its full effect; an example would be thyroid hormones allowing growth hormone to have its full metabolic effects.

  • Synergistic Interaction

    A term used to describe hormones that create similar effects through slightly different mechanisms; an example would be ADH stimulating kidneys to retain water while aldosterone stimulates kidneys to retain sodium, which in turn retains water.

  • Target Cell

    The cell or group of cells with which a hormone is designed to interact.