MT week 1

which two are the two types of cardiac cells?

• electrical
• contraction
• conducation
• mechanical

which physical sign is used to reflect the mechanical function of the heart?

• pulses
• perfusion parameters
• blood pressure
• all of the above

what are the 2 primary electrolytes that allow the heart to initiate impulses

• sodium
• magnesium
• potassium
• calcium

If the rate of an EKG is 40-60 BPM, the impluse for that rhythm is coming from what?

• SA Node
• AV Junction
• Ventricle
• All of the above

What does sympathetic stimulation cause?

• Increased heart rate
• Increased AV conduction
• Increased irritability
• Increased activity

What makes the charge within the heart's electrical system?

• whole heart
• individual pacemaking cells
• electrical stimuli
• potassium electrolytes

What is the inherent rate of the SA node

• 20-40 bpm
• 40-60 bpm
• 60-100 bpm
• 50-80 bpm

What is it called when the normal pacemaker slows down?

• Irritability
• Escape
• SA Node
• AV Junction

Which of the following is a cause of sympathetic stimulation?

• Increases heart rate
• Increased AV conduction
• Increased Irritability
• All of the above

What is the return of electrical charges to their original state of readiness?

• repolarization
• depolarization
• polarization
• irritability