Midterm paper

MODULE 4 LO2 Contractile Cells

Dr. Lisa Brinn [email protected]

2. Contractile Cells

-70mV

-90mV 🟰

+20mV

🟰

🟰

↑ 3Na+

2K+

↑

⥥K+

⥥Na+ Na+

Na+ Na+Na+

+10mV 🟰

⥥ K+

⥥Ca++

-90mV 🟰

⥥ K+

-70mV

Voltage-gated Na+ channels open

Slow K+ channels open Slow Ca++ channels open

Voltage-gated K+

channels open

Voltage-gated K+

channels close

Depolarization

Repolarization

Plateau