Non-tropic hormone

Non-tropic hormone

Non-tropic hormones are hormones that directly stimulate target cells to induce effects. This differs from the tropic hormones, which act on another endocrine gland.

Most endocrine glands, such as the gonads, pancreas, and adrenal glands, produce non-tropic hormones. Those released from the pituitary gland in the brain include:

  • Oxytocin (posterior lobe)- stimulates milk letdown in females.
  • Prolactin (PRL) (anterior lobe) - is remarkable for the diversity of its effects among vertebrate species. The varied roles suggest that prolactin is an ancient hormone with functions that have diversified during the evolution of vertebrate groups.
  • Melanocyte-stimulating hormone (MSH) (intermediate lobe) - regulates the activity of pigment-containing cells in the skins of some amphibians. In mammals, MSH act on neurons in the brain, inhibiting hunger.
  • Growth hormone (GH)—primary stress hormone

[1]

Contents

See also

References

  1. ^ Cambell, Neil A.; Jane B. Reece. Biology (6th ed.). Sinauer Associates. ISBN 0-321-27045-2. 

Sources

  • Biology 12 McGrawHill Ryerson (Textbook)

External links

http://www.mcgrawhill.ca/school/booksites/biology+12/index.php



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