Which valves are most commonly affected by infective endocarditis?
Responda
Aortic and Mitral Valves
Aortic and Tricuspid Valves
Tricuspid and Mitral Valves
Questão 2
Questão
What is the name of the muscle found in the atrium
Responda
Pectinate
Trabeculae carnae
Questão 3
Questão
There are [blank_start]two[blank_end] specialised types of cardiac muscle cell. The contractile cells, composing [blank_start]99%[blank_end] of cardiac muscle cells and the auto-rhythmic cells, which initiate and conduct [blank_start]action potentials[blank_end] for contraction of working cells.
Responda
two
99%
action potentials
Questão 4
Questão
The SA node, is always in transient state towards hyperpolarisation. This causes activation of the funny Na+ channels allowing an influx of Na+. K+ channels close slowly allowing threshold to be reached. The next step is?
Responda
Closing of Na+ channels and opening of transient calcium channels
Opening of transient Na+ channels and opening of transient calcium channels
Questão 5
Questão
The auto-rhythmic cells of the SA node set the pace of the heart at [blank_start]70-80[blank_end] BPM, in the presence of parasympathetic tone. These cells have the fastest rhythm at controlling heart rate. The cells of the AV node are [blank_start]slower[blank_end] and set a rhythm of 40-[blank_start]60BPM[blank_end].
Responda
70-80
80-100
100-120
slower
faster
60BPM
100BPM
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