Small intestine

Question 1

Peristalsis

Answer 1

Propels food along SI. Circular muscle behind contracts and longitudinal muscle ahead contracts to propel material along
Phasic

Question 2

Segmentation

Answer 2

Phasic

Muscles propel food in different ways to mix intestinal secretions with chyme

Question 3

Motor migratory complex

Answer 3

In fasted state.
Big sweeps starting from stomach which diminish as they make their way along
Clean out residue like dead cells, undigested food
Stop colonic bacteria entering ileum
Keeps bowel muscle healthy

Question 4

Ileocaecal junction

Answer 4

Separates ileum from colon
Stimuli proximal to sphincter = relax so ileum distension causes relaxation
Stimuli distal to sphincter = contract so colon distension causes it to contract
Regulated by luminal contents + pressure both proximal + distal