Part 4 Flashcards
platelets help in the repair of a damaged vessel wall by releasing
growth factor
what is not a function of prostacyclin
acts as a vasoconstrictor
how does dicumarol function as an anticoagulant
inhibits liver clotting factors
what effect will occur if fast Na channels in a cardiac cell are blocked
the cell will depolarize at a slower rate
the stable resting polarizes state in a typical cardiac muscle cell is due to
K at its Nernst equilibrium potential and an impermeable membrane to Na and Ca
how does digitalis act to increase strength of contraction
decreases function of Ca exchange protein
a machinery murmur heard throughout the entire cardiac cycle is likely associated with
patent ductus arteriosis
as systemic arterial BP is increased, what happens to the strength of the LV contraction if the ANS effect on the heart is blocked
increase in LV contractile strength
how does the stretch on the AV node increase HR
by increasing membrane permeability to Na/Ca
increased stretch on the ventricular myocardium at the end of diastole is associated with
increase calcium influx
PSNS activation can cause inhibition of NE release presynaptically
true
what normally prevents cells other than SA nodal cells from firing spontaneously
overdrive suppression
