Electrophysiology
Objectives
At the end of this chapter, the student should be able to:
- List the main ions of the extracellular and intracellular spaces in the resting phase. (p 25)
- Discuss the importance of ion movement through the cell membrane in the formation of bioelectricity. (pp 25–26)
- Define the terms channel and pump as they relate to the cell membrane. (p 26)
- Describe the association of phase 4 of the cellular action potential and the pacemaking function of the heart. (pp 26, 27)
- State the value of the resting potential of the myocardial cells. (p 26)
- List the two divisions of the autonomic nervous system. (pp 28–29)
- Discuss how the two divisions of the autonomic nervous system are in a “tug-of-war” to control the body in states of both relaxation and stress. (pp 29–30)
- List the chemical transmitters of the sympathetic and parasympathetic systems. (pp 30, 31)
- Clinically analyze and defend which system (sympathetic or parasympathetic) would be more deleterious to the patient in the middle of a life-threatening ischemic event. (pp 30–31)
- Once learning objective 9 has been completed, switch sides in the debate and analyze and defend the other side. (pp 30–31)
