Membrane Potential Changes in an Isolated Cardiac Muscle Cell Are

question 170

Multiple Choice

Membrane potential changes in an isolated cardiac muscle cell are recorded along with ion movements across the cell membrane (see graph below) . Which of the following ion sequences corresponds to regions 1-2-3 on the graph, respectively?

• A)Potassium, sodium, calcium
• B)Sodium, calcium, potassium
• C)Calcium, sodium, chloride
• D)Calcium, sodium, potassium
• E)Sodium, potassium, calcium

---

Definitions:

Knights Of Labor

One of the first major labor organizations in the United States, founded in 1869, that sought to include all working people, regardless of skill level, gender, or race.

American Federation Of Labor

A national federation of labor unions in the United States, founded in 1886, that focused on advocating for better working conditions and wages for skilled workers.

Radical

A term often used to describe individuals, groups, or ideas that advocate for thorough or complete political or social reform.