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20 Cards in this Set
- Front
- Back
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Movement through the GI tract? |
Smooth muscle electrically coupled. Segmented. Peristaltic contractions. |
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What's intrinsic innervation enteric nervous system? Where is it? What does my enteric plexus do? What does submucosal plexus do? |
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Extrinsic innervation autonomic innervation. What does parasympathetic do? What does sympathetic do? |
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How do hormones regulate GI tract? What's endocrine and paracrine? |
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What does saliva do? How is it controlled? Para vs sympa? 3 steps of swallowing |
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What are gastric glands? Name two |
Stomach is lined with gastric glands. They secrete gastric juice. Parietal cells secrete acid. Chief cells produce pepsinogens. |
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What is gastric fluid made up of? 4 |
Salts, HCl, pepsinogens, water. 2-3L produced everyday |
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What is HCl used for?4 |
Not essential for digestion but - Aids breakdown of tissue - Activates pepsinogen and optimizes pepsin function - Absorption of Calcium and Iron - Protects against microorganisms/pathogens |
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How is stomach acid formed? 3steps |
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3 regulator of acid secretion |
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What's gastric mucosa do? |
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3 disorders to do with increased acid production |
GORD - Gastro-oesophageal Reflux Disease Gastric bleeding Ulceration |
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What does stomach do in gastric propulsion |
Peristaltic waves propel contents to duodenum via pyloric sphincter |
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What happens during vomiting |
Stomach relax, duodenum contract. Diaphragm and abdominal muscles contract powerfully. Gastro-oesophageal sphincter relaxes. |
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Which part of brain controls vomiting? |
Medulla. Chemoreceptor trigger zone (CTZ) and the Vomiting centre. |
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What does liver and pancreas do? |
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How are monosaccharides and amino acids, fats, water soluble vitamins absorbed in small intestine? |
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What does large intestine do? |
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What's dietary fibre needed for? |
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How does movement in GIT occur? What produces stomach acid? |
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