Gastrointestinal Physiology Questions PDF

1- The myenteric plexus of the enteric nervous system includes: a. Somatic sensory neurons b. Inhibitory interneurons * c. Presynaptic motor neurons d. excitatory sympathetic neurons e. sympathetic postganglionic neurons 2- The pharyngeal phase of swallowing: a. is par...

1- The myenteric plexus of the enteric nervous system includes: a. Somatic sensory neurons b. Inhibitory interneurons * c. Presynaptic motor neurons d. excitatory sympathetic neurons e. sympathetic postganglionic neurons 2- The pharyngeal phase of swallowing: a. is partially voluntary b. includes opening of the upper oesophageal sphincter * c. includes the peristaltic activity of the upper third of the oesophagus d. is associated with opening of the glottis e. is preceded by deep inspiration 3- The secretion of enzyme by the exocrine pancreas is increased by: a. inhibitors of gastrin hormone b. sympathetic stimulation c. secretin d. CCK * e. noradrenaline 4- Contraction of the gallbladder is mainly mediated by: a. secretin b. VIP c. bile salts d. atropine e. CCK * 5- The jejunum is the main site for absorption of the following except: a. glucose * b. amino acids c. fatty acids d. bile salts e. water 6- The movements of the colon include: a. migrating motor complex b. slow wave movement c. pendular movement d. enterocolic reflux  e. segmentation 7- Central stimuli to vomiting include: a. irritation of the colon b. diseases of the inner ear c. microbial toxins in the blood * d. severe exercise e. cerebellar lesions 8- The functions of human stomach include: a. absorption of iron b. absorption of vitamin B12 c. absorption of 50% of water intake d. storage of food for 4 hours * e. limited digestion of proteins 9- Pancreatic proenzymes activation is stimulated by: a. CCK b. secretin c. trypsinogen d. gastrin e. enteropeptidase * 10- Micelles: a. are emulsified fat globules in the duodenum b. are packets of pro-enzymes found in pancreatic acinar cells. c. are dead enterocytes leaving the tips of villi. d. are micro structures of cholesterol and fatty acids coated with bile salts * e. are the triglyceride particles formed by enterocytes and transported in the lymphatic system.