lab exam 2 Flashcards
is cardiac muscle neurogenic or myogenic
myogenic
what is the difference beween a neurogenic muscle and a myogenic muscle?
neurogenic- nervous system initiates
myogenic- self generating
if cardiac muscle were suddenly under the influence of the sympathetic nervous system, heart rate would _______ and contraction force would _______
increase
would you find greater concentration of sodium ions inside or outside of a cardiac muscle cell
outside
in the cardiac muscle lab what solution was used to keep the frog heart moist
ringers solution
if cardiac muscle were suddenly under the influence of the parasympathetic nervous system, heart rate would _______ and contraction force would _______
decrease
would you find greater concentration of potassium ions inside or outside of a cardiac muscle cell
inside
in the cardiac muscle lab an ___ inch fish hook was used
18
in the cardiac muscle lab the fishhook is placed on a ___ angle
right
in the cardiac muscle lab when reading the heart rate the first bump is the ____________ and the second bump is the _______________
atrial contraction
ventricle contraction
in the cardiac muscle lab when added norepinephrine the heart rate ______ and the rate/force ________
increases, increases
in the cardiac muscle lab when added acetylcholine the heart rate ______ and the rate/force ________
decreases, decreases
in the cardiac muscle lab when added atropine the heart rate ______ and the rate/force ________
increases, increases
in the cardiac muscle lab when added NaCl the heart rate ______ and the rate/force ________
increases, increases
in the cardiac muscle lab when added KCl the heart rate ______ and the rate/force ________
decreases, decreases
in the cardiac muscle lab when added calcium chloride the heart rate ______ and the rate/force ________
decreases, increases
in the cardiac muscle lab the ______ of the heart is removed
pericardium
in the cardiac muscle lab how do you figure out beats per minute when reading heart rate
60 seconds divided by wave duration
in the cardiac muscle lab how do you calculate wave duration
M marker at the peak of the wave, cursor at the next peak
in the cardiac muscle lab how do you measure contraction force
M marker at the base of the wave, cursor at the peak
in the cardiac muscle lab under what conditions will norepinephrine be released
sympathetic
in the cardiac muscle lab what is the effect of norepinephrine on heart rate and contractility
they will go up
in the cardiac muscle lab under what types of conditions will ACh be released
parasympathetic
in the cardiac muscle lab what is the effect of ACh on heart rate and contractility
they will go down