Chapter 6- Small Intestines Flashcards
What are the THREE general functions of the SI?
digestion
absorb nutrients
produce intestinal hormones (including DNES cells)
What are the THREE surface adaptations of the SI that increase surface area by a factor of 400 plus?
plicae circulares (valves of Kerckring)
villi
microvilli
Which surface adaptation of the SI are permanent folds affecting the mucosa and submucosa; found throughout the duodenum, jejunum and proximal ileum?
a. plicae circulares (valves of Kerckring)
b. villi
c. microvilli
plicae circulares (valves of Kerckring)
What cell type is the surface epithelium in the SI composed of?
simple columnar
Which surface epithelium type of the SI contains microvilli?
a. regenerative cells
b. goblet cells
c. DNES cells
d. surface absorptive cells
e. M (microfold) cells
f. paneth cells
surface absorptive cells
Which surface epithelium type of the SI functions to absorb water and nutrients?
a. regenerative cells
b. goblet cells
c. DNES cells
d. surface absorptive cells
e. M (microfold) cells
f. paneth cells
surface absorptive cells
Surface absorptive cells of the SI involve terminal digestion in _________ cells, produce enzymes and absorb monosaccharides and peptides
glycocalyx
Which surface epithelium type is fewest in the duodenum and most in the ilium?
a. regenerative cells
b. goblet cells
c. DNES cells
d. surface absorptive cells
e. M (microfold) cells
f. paneth cells
goblet cells
Which DNES cell of the SI produces SECRETIN; which stimulates pancreas secretion of bicarbonate from the pancreatic ducts?
a. type I
b. type K
c. type S
type S
Which DNES cell of the SI produces CHOLECYSTOKININ (CCK); which stimulates gallbladder contraction and pancreatic secretion of enzymes from serous acini?
a. type I
b. type K
c. type S
type I
Which DNES cell type of the SI produces GASTRIC INHIBITORY PEPTIDE (GIP); which inhibits HCI release?
a. type I
b. type K
c. type S
type K
Which surface epithelium type of the SI are found in crypts?
a. regenerative cells
b. goblet cells
c. DNES cells
d. surface absorptive cells
e. M (microfold) cells
f. paneth cells
regenerative cells
Which surface epithelium type of the SI are located in CRYPTS and produce LYSOZYMES?
a. regenerative cells
b. goblet cells
c. DNES cells
d. surface absorptive cells
e. M (microfold) cells
f. paneth cells
paneth cells
Which surface epithelium type of the SI are located in the ILIUM EPITHELIUM and function to PROMOTE HUMORAL IMMUNITY?
a. regenerative cells
b. goblet cells
c. DNES cells
d. surface absorptive cells
e. M (microfold) cells
f. paneth cells
M (microfold) cells
The LAMINA PROPRIA of the SI are found in the _______
villus core
LACTEALS and VASCULAR COMPONENTS (small BVs) of the SI are found in which layer?
lamina propria
The __________ of the SI boarders the CRYPTS OF LIEBERKUHN (intestinal glands)
Lamina propria
The DUODENUM, JEJUNUM, and ILEUM are all found in the _________ layer of the SI
submucosa
The submucosa of the SI is composed of ___________
dense fibroelastic CT
BRUNNER GLANDS which of the SI are found in
a. duodenum
b. jejunum
c. ileum
duodenum
Brunner glands of the duodenum produce _________ which functions to neutralize chyme
alkaline mucus
Peyers patches are located in the ___________
a. duodenum
b. jejunum
c. ileum
ileum
The function of the submucosal (myenteric) plexus of the ileum is to _________
influence mucosa
What is the function of the myenteric (auerbach) plexus of the muscularis externa in the ileum?
stimulates the ME for peristalsis
__________ is found in all of the jejunum and ileum, and the last 1-2 cm’s of the duodenum
serosa
________ is found in the vertical (descending) portion of the duodenum
adventitia
__________ is found between the ileum and the cecum of the colon. It is a physiological and anatomical sphincter
ileocecal valve
