Week 3 Flashcards

1
Q

learning objs for Tbl 2

A

Interpret a Forest plot
Discuss the relationship between GERD and ulcers and the following risk factors: H.pylori infection, coffee consumption, age, gender, bmi, pepsinogen I/II ratio, smoking, and alcohol
Describe the benefits of a cross-over study design
Draw the mechanism of dumping syndrome
Evaluate therapeutic options including pasireotide in the treatment of dumping syndrome

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2
Q

Malrotation

A

midgut herniates at 4th week and returns approx 10th week

rotates around the axis of SMA 270 degrees counterclockwise

see birds beak

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3
Q

complete nonrotation of the gut

A

ligament of treitz on the right side of abdomen does not cross midline

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4
Q

for malrotation what do you do before and after surgery

A

resuscitate first decompress the stomach with NG tube or they would have a cardiac collapse because they don’t have enough intravascular volume

place a foley

after the main procedure (i guess during the surgery tho) you take out the appendix because future appendectomy would present in the LUQ and would be confusing…..

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5
Q

ion status of pyloric stenosis

A

hypokalemic, hypochloremic metabolic alkalosis from vom

give normal saline until they start making urine, THEN replace the potassium one they have the “extracellular space” for it

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6
Q

intussusception

A

inversion of the small bowel into the large (usually)

think of the water snake toys

colicky abdominal pain “bring up their legs for a couple minutes, cry, and then they are fine. repeat every couple minutes. Bilious emesis, previous URI (causes lymphoid aggregates in the terminal ileum to increase), currant jelly stool (mucosal ischemia - order is lymphatic obstruction, venous congestion, arterial congestion, ischemia and necrosis)

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7
Q

where does the pelvic diaphrgm insert

A

“hangs” from a thickened layer of fascia on the obturator internus

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8
Q

muscles that make up the pelvic diaphram

A

levator ani (anterior) (contains the muscle from back to front iliococcygeus, pubococcygeus, puborectalis)

coccygeus is further back than those (AKA ischiococcygeus)

(piriformis is posterior to the coccygeus

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9
Q

What muscle connects the back of the pubic bone with the coccyx?

A

pubococcygeus

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10
Q

what structures go out of the greater siatic foramen in back into the lesser siatic foramen

A

pudendal nerve, artery, vein

hey curve around the ischial spine

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11
Q

what does the obturator nerve innervate

A

the adductors of the legs

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12
Q

what goes from the coccyx to the ischial spine

A

coccygeus

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13
Q

the pelvic abdomen originates from this muscle

A

Tendinous arch of obturator internus

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14
Q

what go in between piriformis and coccygeus

A

sciatic nerve
inferior gluteal N,A,V
pudendal (but it comes back in through the greater sciatic foramen)

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15
Q

what muscle extends anteriorly from the pubic bone to the ischial spine

A

obturator internus

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16
Q

what muscle goes from the posterior portion of the tendinous arch of the obturator internus to the coccygeus

A

iliococcygeus

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17
Q

what forms the “puborectal sling”

A

puborectalis

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18
Q

what are peptides cotransported with in order to get into the enterocyte

A

H+

Pept1 cotransporter

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19
Q

during the cephalic and gastric phases, vagal stimulation causes release of pancreatic enzyme including this peptide that isn’t in first aid so its not in my other flashcards

A

Monitor peptide

this and CCK-RP cause release of CCK from I cells into the blood

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20
Q

what part of the brain is important in monitoring energy expenditure vs energy intake

A

hypothalamus

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21
Q

neuropeptide-y

A

increases ghrelin

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22
Q

agouti related peptide

A

increases ghrelin

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23
Q

GIP
stimulus
target
effect

A

gastric inhibitory peptide

glucose, fatty acids, amino acids in small intestine

targets beta cells of pancreas

stimulates insulin release, inhibits gastric emptying and acid secretion

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24
Q

kupffer cells

A

macrophages of the liver

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25
Q

what cells secrete cytokines inducing collagen production by stellate cells, which causes portal hypertension and hepatic encephalopathy

A

kupffer cells

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26
Q

bacteria convert bile into

A

urobilinogen - goes to urine and is converted to urobilin (makes urine yellow)

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27
Q

what compound make poop brown

A

stercobilin

made from urobilinogen

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28
Q

what makes a gall stone

A

unconjugated bilirubin most of the time

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29
Q

what makes primary bile acids from cholesterol

A

7alpha-hydroxylase

reabsorbed bile acids (chenodoxycholic and cholic acid) inhibit this enzyme

30
Q

primary bile acids

how do they become more effective

A

chenodoxycholic and cholic acid

become more effective when conjugated to glycine or taurine

31
Q

cholestyramine

A

bile acid sequestrant

sequesters bile acids, which drives more creation of bile acids from cholesterol

decreases cholesterol levels

32
Q

lithocholic acid

A

a secondary bile acid created by bacterial deconjugation that is cytotoxic

can be sulfated leading to its excretion

33
Q

how to make conjugated bilirubin

condition in infants who cannot make it?

A

bilirubin is conjugated with glucuronic acid by the enzyme glucuronyltransferase

the enzyme is slow to start up in babies, leading to jaundice

Infants who have a developmental deficiency in UDP-glucuronyl transferase are unable to hepatically metabolize the antibiotic drug chloramphenicol (binds 23s of 50s and prevents peptidyl transferase) which requires glucuronidation. This leads to gray baby syndrome

decreased activity in gilbert syndrome, absent in crigler-najjar

34
Q

3 things that are symported with sodium in the enterocyte

A

glucose, bile salts, amino acids

35
Q

where is most diatary iron absorbed

what transporters

A

duodenum

HT (heme transporter)

DMT1 (transports ferrous Fe2 form)

36
Q

SGLT1

A

sodium glucose transporter

symports glucose with sodium

37
Q

in chronic pancreatitis which is first to go: endocrine or exocrine function

A

first to go is exocrine

38
Q

type I autoimmune pancreatitis

what cells
what do they do

A

lymphocytic sclerosing of pancreas with IgG4 producing plasma cells

makes a hard mass that feels and looks like pancreatic cancer

somewhat analogous to sarcoid - where diverse organ manifestations are linked by the same histopathological problem

39
Q

what causes pancreatic pseudocysts

why are they called pseudo

A

acute pancreatitis, trauma

inflammatory fibrous cyst that lacks an epithelial lining
(pseudocyst)

account for 75% of cysts in the pancreas. Cyst fluid are high in amylase

40
Q

IPMN

A

intraductual papillary mucinous neoplasm

this tumor communicates with the pancreatic duct and lacks ovarian type stroma

see dilated ducts on ERCP (Endoscopic retrograde cholangiopancreatography)

get really long columnar cells on histo. nuclei get dark, large, and rounded

can lead to pancreatic exocrine carcinoma

41
Q

most common location of pancreatic carcinoma

A

head

42
Q

how do you diagnose pancreatic carcinoma

A

endoscopic ultrasound fine needle aspiration

EUS FNA

43
Q

pancreatic neuroendocrine neoplasms

differences from pancreatic carcinoma

A

body or tail of pancreas instead of head

well circumscribed!!

hyperinsulinemia

44
Q

pancreatic neoplasm assc with MEN

A

pancreatic neuroendocrine neoplasm

45
Q

what do you order if you want to see if someone has gall stones

A

ultrasound

radiolucent on xray (most of them)

46
Q

you see yellow stuff in a gall bladder and you don’t want to look like an idiot in front of a pathologist that cares as much as nelson. what do you say

A

it’s cholesterolosis

benign

foamy macrophages full of cholesterol

47
Q

what structures are in the hepatoduodenal ligament

A

common bile duct
hepatic artery
portal vein

48
Q

skeletal muscle of the pharynx and upper esophagus derived from the ___

supplied by what nerve

A

branchial arch mesoderm

vagus

49
Q

what nerves supply the hindgut

A

S234

pelvic splanchnics

50
Q

what gives rise to much of the diaphragm

what nerve does it have in it

A

transverse septum

phrenic nerve (c3,4,5)

51
Q

what embryological structure forms the liver

A

ventral mesentery

52
Q

two ligaments of the ventral mesentery

A

hepatogastric

hepatoduodenal

53
Q

what nodes does the proctodeum (lower third of the anal canal) drain into

A

superficial inguinal nodes

54
Q

what nodes does the hind gut portion of the anal canal (upper third of the anal canal) dain into

A

inferior mesenteric nodes

55
Q

what cleaves an alpha 1,1 bond

A

trehalase

56
Q

fiber is converted to what by bacteria in the lumen of the gut

A

acetate

two carbon short chain F.A.

57
Q

what component of human breast milk can be converted to short chain FA in the gut of a healthy infant

A

oligosaccharides

58
Q

main insoluble fibers

A

lignin cellulose hemicellulose

they decrease GI Transport time.

59
Q

main form of fiber in metamucil

A

Psyllium

soluble, viscous fiber. Indigestible and hold a lot of water

60
Q

what is a substrate for amylasy - alpha1,4 bonds or beta

A

alpha - like simple starch

example of beta would be cellulose (plant cell walls)

61
Q

lignins

A

branched polymers of phenolic subunits. found in stems and seeds of fruits

62
Q

what is abundant in apples, strawberries, and apples lmao

whats the backbone

A

pectins

backbone: galacturonic acid

63
Q

“wound repair” carbohydrate of trees

A

gum arabic

64
Q

what found in oatmeal is completely fermented by gut bacteria to short chain FA

A

beta-glucans

homopolymers of glucopyranose

65
Q

bacteria breaks down stuff to provide fuel for colonocytes

what is the stuff?

what is the transporter

A

they break down fiber into short chain FA

get uptaken by monocarboxylate transporter

66
Q

SCFAs effect our immunity how

A

act as a ligand for GPR43

e.g. in the macrophage inflammatory cytokines go down, IL-10 goes up (antiinflammatory.

67
Q

GPR43 in adipose

A

decreased fat storage as TAG, and decreases insulin sensitivity when activated

(mice with over expressed GPR43 are leaner)

68
Q

pyloric stenosis assc with what antibiotic

A

systemic use of erythromycin when the baby is born (not in the eye)

69
Q

why would you not want to be on a macrolide fro 14 days according to pruneski (f)

A

because of induction of the migrating motor complex

diarrhea

70
Q

what pumps hydrogen out of the parietal cell

A

a K+ H+ ATPase

71
Q

antibodies for celiacs

A

tissue trans glutaminase (TTG)