6.5 PEx: Cardiovascular Physiology Lab Part 1

Part A

When the cardiac muscle cell is at rest, the concentration of _____________ is greater on the outside of the cell.
    potassium and sodium
    calcium
    potassium
    sodium
    sodium and calcium

Part B

Modifiers that affect the force of contraction of the heart are _______.
    chronotropic
    inotropic
    agonists
    antagonists

Part C

The movement of _______________ into the cardiac muscle cell depolarizes the cardiac muscle cell.
    sodium and calcium
    potassium, sodium and calcium
    potassium
    calcium
    sodium

Part D

Modifiers that affect heart rate are _______.
    agonists
    inotropic
    antagonists
    chronotropic