Lec 1-7 - GI Regulation Flashcards Preview

Dental Physiology > Lec 1-7 - GI Regulation > Flashcards

Flashcards in Lec 1-7 - GI Regulation Deck (27):
1

plexus between epithelium and circular muscle

submucosal plexus

2

plexus between circular and outer longitudinal muscle

myenteric plexus

3

liters of water in the body

40 L

4

secrete blank liters of water during the day into the lumen (NOT EXCRETE)

8 L

5

there is blank and blank breakdown of stuff in GI

chemical, mechanical

6

secretion of organics, ions, and water by epithelium is blank but absorption is blank

expensive, efficient

7

fastest chemical regulator to slowest

neuroendocrine > endocrine > paracrine

8

side effect of opiates can be blank because it slows smooth muscle contractility of GI

constipation

9

true hormones are produced in response to a blank and at blank tissue concentrations

meal, physiological

10

two families of true hormones

cholecystokinin (CCK), Gastric inhibitory peptide (GIP)

11

plexus that does some central processing and control smooth muscle

myenteric

12

plexus that gets chemical sensations from the epithelium

submucosal

13

excitatory motor neurons of gi release these nt

ach, substance p

14

inhibitory motor neurons of gi release these nt

VIP, NO

15

smooth muscle can provide the blank for flow in the GI tract or blank to flow in the CV system

driving force, resistance

16

multiunit smooth muscle has each cell being blank

innervated

17

smooth muscle action potential drives blank out of the cells and blank into the cells

K+, Ca2+

18

most important source of calcium in visceral smooth muscle

extracellular calcium

19

calcium in skeletal muscles comes from intracellular stores so it is blank compared to visceral smooth muscle

faster

20

Special properties of visceral smooth muscle occur because smooth muscle cells have a blank membrane potential that can be affected by blank nt

Unstable, enteric

21

Example of enteric nt that can affect smooth muscle by increasing number of action potentials

Ach

22

Increasing number of action potentials in the gut leads to blank

Increased muscle tone

23

Cajal discovered theese things that contact smooth muscle cells and are like the pacemakers

Varicosities (ICC)

24

Ach is the nt of the blank nervous system

Parasympathetic

25

Neurotransmitters that cause action potentials in the gi system if they raise blank which activates the calmodulin/MLCK complex

Calcium concentration

26

Nt of the gi which raise cAmp, interfere with ap by inhibiting phosphorylation of this complex

Calmodulin/MLCK complex

27

There enteric nerves release VIP or NO to cause inhibition

Purinergic

Decks in Dental Physiology Class (60):