L-type calcium channels

Understanding the concepts presented in this chapter will enable the student to: 1. Describe the function of the following cellular components of cardiac myocytes: sarcolemma, intercalated disks, transverse (T)-tubules, myofibrils, myofilaments, sarcomeres, sarcoplasmic reticulum, and terminal cisternae. 2. Describe the composition of thick and thin myofilaments in cardiac myocytes. 3. Describe the significance of a functional syncytium within the heart. 4.

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