Heart

Question 1

syncytium

Answer 1

allow heart to function as one muscle

Question 2

what are the three major conduction vessels of the heart

Answer 2

superior vena cava, aorta, pulmonary trunk

Question 3

what are the two types of heart cells

Answer 3

autorhythmic/pacemaker cells, contractile cells

Question 4

pacemaker cells

Answer 4

set the rhythm/pace of the contraction cells

Question 5

where are pacemaker cells located

Answer 5

sa node and av node

Question 6

artificial pacemakers

Answer 6

the size of a quarter and is placed under the skin beneath the clavicle, wires come from this and attach to the heart and do the job of the pacemaker*it is possible that things with high voltage or waveforms may affect the rhythm of the pacemaker that’s why they sometimes say to stay away from microwaves

Question 7

what does depolarization do

Answer 7

open voltage gated FAST sodium channels in the sarcolemma

Question 8

what happens when calcium and potassium channels are open

Answer 8

when calcium opens calcium comes in when potassium opens potassium comes out

Question 9

plateau

Answer 9

phase of action potential is very beneficial and needed for the heart to prevent tetanus or summation this would be fatal