Describe AP generation with the heart compared to skeletal: skeletal has depolarization (Na+); repolarization and hyperpolarization (K+); cardiac conduction system - prepotential (sodium); threshold and depolarization (Ca++); repolarization (K+); muscle cell contraction - depolarization phase- Na+ ions; early repolarization-K+ channels; plateau phase-Ca++ channels; K+ leaves to complete repolarization;

In a cladogram' when does a group of organisms branch off

How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.

What are the three different shapes, or structures, of carbon-based molecules