The Primary Pacemaker Cell of the Heart Is The

question 16

Multiple Choice

The primary pacemaker cell of the heart is the:

• A) AV node.
• B) bundle of His.
• C) Purkinje network.
• D) SA node.

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Definitions:

Phospholipids

Phospholipids are a class of lipids that are a major component of all cell membranes; they form bilayers due to their hydrophilic heads and hydrophobic tails.

Hydrophobic Region

Part of a molecule that is repellent to water, often found in lipids and integral membrane proteins.

Hydrophilic Region

Describes a part of a molecule or structure that is attracted to water and tends to interact well with it.

Hydrogen Bond

A weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.