Give a detailed explanation of defecation relex.
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
Give a detailed explanation of defecation relex.
ANSWER SHOULD INCLUDE:
what does reflex mean?
Firstly; what happens when faeces enter the rectum following 'mass movement '( peristalsis)? I.e. How is stretch of the walls of rectum detected? (Which part of nervous system is involved)?
Secondly: which sprinter opens? How? ( signal sent via?). What type of muscle is involved? Whis the result?
Thirsly: How does external sprinters open? ( what type of muscle is it?) . What else aids the expulsion of faeces from anal canal?
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