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VTPP 435 LAB EXAM 2 QUESTIONS AND ANSWERS ELABORATIONS!!
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VTPP 435 LAB EXAM 2 QUESTIONS AND ANSWERS ELABORATIONS!!
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VTPP 435 LAB EXAM 2 QUESTIONS AND ANSWERSELABORATIONS!!
effect of para and symp stimulation on pacemaker cells in GI smooth muscle
(Frequency of contractions)
Answers:No effect--
Pacemaker cells set the rythmn-- no muscarinic or adrenergic receptors on PMC--
NO EFFECT
3 major challenges of Dige
Answers:1. Avoid Autodigestion
2. Mass Balance
3. Defense
EDV =
wrt RT
Answers:0.008 * RT (resting tension mN)+ 1
SV =
wrt CT
Answers:0.006 * CT (contraction tenstion mN)
Potassium equilibrium potential =
Answers:61log[O]/[I]
Aortic valve
, Answers:The semilunar valve separating the aorta from the left ventricle that
prevents blood from flowing back into the left ventricle.
Pulmonic Valve
Answers:right semilunar valve separating the right ventricle and pulmonary artery
tricuspid valve
Answers:tri = right --valve between the right atrium and the right ventricle
mitral valve
Answers:valve between the left atrium and the left ventricle; bicuspid valve
Acetylcholine effect on smooth muscle tone GI
Answers:Ach-- stimulate parasymp nervous system which is EXCITATORY in
GI-- increase baseline tome and contraction strength
Epinephrine effect on smooth muscle tone GI
Answers:Activate sympathtic NS-- INHIBITORY in GI-- alpha2 receptors--
decrease baseline tone and contraction strength
Acetylcholine after neostigmine effect on smooth muscle tone GI
Answers:Neostigmine is a acetylcholinesterase BLOCKER (antagonist)-- ACh
cannot be removed from receptors-- increase in tone and contraction strength
Atropine effect on smooth muscle tone GI
Answers:Atropine-- muscarinic blocker (antagonist)-- blocking parasymp
activity-- decrease baseline tone and contraction strength
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