Endocrine System

• Gland

  An organ that releases hormones
• Hormone

  Small chemical that binds to a receptor on a target cell
• Endocraine system

  Network of glands that releaase hormones into the bloodstream.

  The hormones bind to specific cells that have the correct receptors
• Target cells

  Cells that have the correct receptor for a particular hormone to bind to
• Pituitary gland

  Secretes several hormones into the blood.

  These hormones act on other glands to stimulate other hormones
• Adrenal glands

  Release adrenaline
• Adrenaline

  Increases heart rate

  Increases breathing rate

  Increases blood pressure
• Thyroid gland

  Release thyroxine
• Thyroxine

  Increases metabolic rate.

  Plays a role in growth and development
• Hormone that stimulates the thyroid gland

  Thyroid stimulating hormone (TSH)
• Testes

  Release testosterone
• Ovaries

  Release oestrogen and progesterone