Motility

Question 1

Describe the process of swallowing

Answer 1

Bolus moved to pharynx by tongue, Triggers involuntary portion, Larynx raised, Peristalsis moves bolus down oesophagus

Question 2

Source of contraction in the stomach

Answer 2

Pacemaker cells in the cardia

Question 3

Pattern of contraction in the stomach

Answer 3

Peristaltic wave from the fundus to the pylorus

Question 4

Describe the pattern of motility in the small bowel

Answer 4

Small segements contract forcing food either way to mix, Overall movement comes from gradient of frequency

Question 5

Describe the pattern of motility in the large bowel

Answer 5

Haustra are drawn together by tenaie coli

Question 6

Describe a mass movement

Answer 6

Perstaltic wave forcing faeces into the rectum