Download cardio 2 - Iowa State University

Cardiovascular 2
Supplemental Instruction
Iowa State University
SI Session
Leader:
Course:
Instructor:
Date:
Chelsea P
AnS 214
Dr. Selsby
2/26/17
1. Label the parts of the heart.
2. A heartbeat originates with the depolarization of __________________________ cells at
the ___________________________ also called the _______________________. The
electrical signal is transmitted to the ____________________________ which connects
the ____________________ and ________________________. The electrical signal
continues through the AV bundle also called the _______________________________
into the left and right ___________________ located in the septum. This carries the
impulse towards the _____________ of the heart. Finally, the signal is conducted into
_________________________________which will depolarize the _________________
fibers in the ventricles.
3. Describe the properties of an autorhythmic heart cell.
4. Label the diagram and explain what is happening at each stage.
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5. What causes the heart to have a long absolute refractory period?
6. Define each homeostatic imbalance.
 Arrhythmia

Fibrillation

Defective SA node

Defective AV node
7. Label the three waves and describe what is taking place.