Week 4 Flashcards
Describe lactose intolerance
There is a deficiency in the brush border lactase enzyme resulting in undigested lactose
What happens to the lactose that is left over in lactose intolerance?
There is an increase in SCFA and hydrogen gas which is formed into acetate, butrate, and propionate which causes water to remain in the lumen giving the patient osmotic diarrhea. The methane and H+ gas is fermented and creates flatulence
______ ________ is the result of a deficiency in the pancreatic enzymes, specifically the lack of trypsinogen
Chronic pancreatitis
If there is an absence of trypsin, what is this called and what happens to all of the other pancreatic enzymes?
Congenital trypsin absence All the pancreatic enzymes are gone
_______ is the defect in transport (SLC3A1) or absence of dibasic AA transporter (SLC7A9) which does not allow cysteine, lysine, arginine, or ornithine to be absorbed in the proximal tubule
Cystinuria
What is Hartnup disease?
An issue with the neutral amino acid transporter
What are some of the symptoms of Hartnup disease?
diarrhea, mood changes, neurological problems, red scaly rash, photosensitivity, short stature, high neutral amino acids in the urine
Describe cystic fibrosis
There is a deficiency in the Cl channels on the apical membrane of duct cells, which result in decreased HCO3 secretion
Describe a gluten allergy
Your body creates Abs against a component of gluten, which causes the destruction of small intestine villi and hyperplasia of the intestinal crypts. causes abdominal pain, constipation, diarrhea, weight loss, vomiting, nausea, and steatorrhea
_______ is the impaired absorption of lipids, which causes the fat to be excreted in the poop
Steatorrhea
______ ______ is the failure to secrete proper amounts of pancreatic enzymes
Pancreatic insufficiency
_______ ______ ________ is due to a gastrin secreting tumor of the pancreas that increases the H+ secretion from the gastric parietal cells causing a lot of acid to be present in the duodenum
Zollinger Ellison syndrome
Pancreatitis is when the pancreatic enzymes, specifically trypsin is activated and ______ the pancreas
self digests
What are some factors that can cause deficits in bile salts?
Ileal resection SIBO
Describe what happens in SIBO
the bacteria deconjugate the bile salts and impairs micelle formation which leads to the bacterial overgrowth in the intestinal mucosa.
A pt presents with abdominal pain, distention, gas, and diarrhea. The patient describes the diarrhea as “very greasy and slick”. You do a breath test and detect excess methane and H+. What is your diagnosis?
SIBO
If there is a vitamin B12 deficiency, what is likely to occur?
Pernicious anemia or possibly microcytic or megaloblastic anemias
________ ________ is a common cause of pernicious anemia where there is chronic inflammation of the stomach mucosa, which leads to the loss of parietal cells
Atrophic gastritis
______ _______ ______ ______ is a common cause of pernicious anemia and is when the immune system attacked the intrinsic factor protein or the gastric parietal cells themselves
Autoimmune metaplastic atrophic gastritis
What are surgical procedures that can impeded the absorption of B12?
Gastrectomy- no parietal cells Gastric bypass-no space for absorption
What does cholera do to the Cl secretion and how?
It increases it by increasing the cAMP which causes secretion of Na and H2O causing massive secretory diarrhea
An infant is brought to the pediatrician by his parents because they are concerned about the of his skin and general behavior changes. They report that he has seemed more tired and weak with his arms just flopping down by his side instead of him reaching for his toys. The parents are known to be first cousins. What is likely the diagnosis?
Crigler Najjar
In Crigler Najjar, what is the form of bilirubin that is in excess?
Unconjugated
In Crigler Najjar, there will be unconjugated hyperbilirubinemia, but there will be low levels of hepatic ______ _______
bilirubin glucose






