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7 Cards in this Set
- Front
- Back
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What is the general structure of the GI tract?
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Mucosa - Epitelial, Lamina propria, muscularis mucosa
Submucosa - Loose connective tissue, blood vessels and the meissner's plexus, White cells Muscularis externa - Inner circular, outter longitudinal - Both sandwich the auerbach plexus Adventita or mesentry (serosa) |
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What thirds of the oesophagus are striated (voluntary) and smooth muscle?
Clinical - What is the condition called where peristalsis is irregular and the cardiac sphincter fails to relax properly? |
Superior 1/3 - striated - Voluntary - involved in first phase of swallowing
Inferior 2/3 - Smooth - Autonomic - Vagus (CNX) nerve Clinical - Oesophageal achalasia - Regurgitation, dysphagia |
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What are the folds in the stomach called and what direction do the canals formed face and why?
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Rugae - The canals formed are angled toward the pylorus and antrum, this is so each contraction decants chyme towards the S.intestines
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What is the name of the circular villi in the small intestines?
How do the local pacemakers of the intestines ensure caudal movement of food? |
Plicae circulars
Local pacemakers control small sections of the intestine. As you move distally down the intestine the pacemakers fire at a slower rate. This means that the proximal intestine decants more often into the distal portion slowly propelling it towards the anus. |
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What is the name of the linear triad of muscles running over the L.bowel and what structure do they converge on?
What are the segments of cube shaped bowel called? Clinical - A low fibre diet and consequent high pressures can contribute to the formation of ........ |
Taeniae coli which converge on the appendix
Haustrations Diverticula |
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How does saliva protect the teeth?
Hard - What is the medical term form the condition dry mouth? |
High in calcium and IgG, bacteriostatic, raises pH (alkaline)
xerostomia |
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What are the treatments for peptic ulcer and GORD?
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H2 antagonist, Proton pump inhibitors - Lower acid production
Life-style changes - Alcohol, smoking, certain foods. |
