The Sequence of an Impulse Moving Through the Conduction System

question 47

Multiple Choice

The sequence of an impulse moving through the conduction system of the heart is

• A) sinoatrial node, atrioventricular node, Purkinje fibers, bundles of His.
• B) atrioventricular node, Purkinje fibers, bundles of His, sinoatrial node.
• C) sinoatrial node, atrioventricular node, bundles of His, Purkinje fibers.
• D) sinoatrial node, bundles of His, atrioventricular node, Purkinje fibers.

Understand the basic principles of phylogenetic trees and evolutionary relationships.

Recognize the concept of synapomorphies and how to identify them.

Distinguish between homologous and homoplastic traits.

Understand the significance of molecular, morphological, and fossil data in phylogenetic analysis.

---

Definitions:

Chlorine

A chemical element with symbol Cl and atomic number 17, a yellow-green gas at room temperature, widely used in water purification, in disinfectants, and in the production of various chemicals.

Sodium

A chemical element with the symbol Na, known for its high reactivity and essential role in biological systems, especially in nerve impulse conduction.

Covalent

Pertaining to chemical bonds formed by the sharing of one or more pairs of electrons between atoms.

Ionic

Relating to ions; typically describes chemical bonds formed between atoms when electrons are transferred, resulting in charged particles.