1 In-text citations in parenthesis, with only the author's last name and page number included (Smith, p. 4). 2  Double-spaced lines, but with no extra line breaks between each citation. 3  Footnotes (superscripted) also used to provide non-essential information.
Muscularis: The muscularis is responsible for segmental contractions and peristaltic movement in the GI tract. The muscularis is composed of two layers of muscle: an inner circular and outer longitudinal layer of smooth muscle.
Control of Movement through the Small Intestine. A number of hormonal and nervous factors initiate and maintain peristalsis and mixing. Nerve impulses which travel throughout the small intestine are triggered by the gastroenteric reflex (refer to Defecation Reflex) and localized distention of the duodenum.