Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Transcribed Image Text:**Question 16**
Define "morphogen" and explain the importance of morphogen gradients in embryonic specification.
Expert Solution
Definition of Morphogen
Morphogen is a protein which is a signalling molecule that helps in formation of organs (morphogenesis) in a body. It is also responsible for size of an organ.
Morphogen can signal more than one type of cell and therefore forms concentration gradient. The regeneration phenomenon can be seen in Planarians is only because of these signal molecules.
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