8- Small Intestine structure and motility

Question 1

how long is the duodenum

Answer 1

12 fingers of 25 cm

Question 2

roel of duoduenum

Answer 2

gastic acid neutralsision, digestion, iorn absobrtion

Question 3

jejunum length

Answer 3

2.5 m

Question 4

jejunum role

Answer 4

nutrient absoption

Question 5

ilium length

Answer 5

3.5 m

Question 6

ileum role

Answer 6

nacl/h2o absorbtion

Question 7

what are pilicae

Answer 7

fold in the intestinal track to increase surface area for absorption

Question 8

type of eptithelium in small intestines

Answer 8

simple colunmanr epithelium

Question 9

vili length

Answer 9

0.5 mm

Question 10

what do re cyrps relase

Answer 10

water and cl

Question 11

what 4 strcures inceas the absoption area in intesit

Answer 11

plicae, villi and microvillie

Question 12

how many ties is teh area increase compared to a flat tube

Answer 12

600 times

Question 13

what do the intresial villi absopb

Answer 13

nacl, monosaccrareis, aminoacids, peptides, fats, vitamins, minerals, water

Question 14

how much intestinal fludi is secreted each day

Answer 14

1500ml per day

Question 15

role of h20 in digestive process

Answer 15

maintains lumenal conttents ina liquid state
promotes mixing of nutrients with digestive system
aids nutrient presentation to absorbing surface
dilutes and washes away potentially injurious substances

Question 16

h20 secterion comes from where

Answer 16

epithelial cells lingni crypts of lieberkuhn

Question 17

is h20 secterion active or passive

Answer 17

passive due to active section of chloride into intesal lumne

Question 18

what pumps puts cloinre into lumen

Answer 18

thorugh a clorien, naosium and potassium transporter

Question 19

how does sodium and potassium leav the intesial cells

Answer 19

potaium, diffusion
na, thorugh soidum potassium atp pump

Question 20

what is the role of the cftr

Answer 20

regulartes the role of clorien into the intela

Question 21

what prostoglydie controals cftr

Answer 21

pka

Question 22

what protiesn changes atp for camp

Answer 22

adenylate cyclase

Question 23

what is cftr

Answer 23

cystic firbosis transmembrane conductance regulator

Question 24

types of intestial mobilty

Answer 24

segmentatoin and peristalsis

Question 25

what is segmentation

Answer 25

the grinding up of food, it shifts form one part being contracted and another being relaxed and vice versa

Question 26

what is peristaltys

Answer 26

movemnet of food along git

Question 27

what cell causes sementation

Answer 27

pacemaker cell

Question 28

what cuaes regualtion oscillation in memabre poteisal in ospahgula cells

Answer 28

intestial basic electical rhymum

Question 29

what happens wiht parasymph effect and sympathic effet on segmeation

Answer 29

parasympathic increase sympathiec decrease

Question 30

when does peristalils occur

Answer 30

when segmentaiton finnishes

Question 31

what ishte migrating motiility complex

Answer 31

pattern of peristalic activyt tranveling down small intesintes

Question 32

what cuaes the start of migraitng motiliy compex

Answer 32

one mmc ending

Question 33

what stop mmc

Answer 33

food arrival in stomac

Question 34

what is the fucntion of mmc

Answer 34

move undigested food to large intestins limit bacterial colonistaion of small intestiens

Question 35

what is the law of the intestiens

Answer 35

if the intesties is desended the oral side of bolus contacts and the anal side of bolus relaxes moving it twoardes the colon

Question 36

whgere is the opening ileocaecal valve

Answer 36

empthy of chime into large intesites from small intesties