Answered: atrioventricular node

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

The atrioventricular node is located in the:

A. right atrium

B. right ventricle

C. septum between the right and left atrium

D. juncture between the right atrium and ventricle

Preganglionic parasympathetic neurons release NT that binds to:

A. nicotinic acetylcholine ligand-gated receptors

B. muscarinic acetylcholine GPCRs

C. beta-1 norepinephrine GPCRs

D. norepinephrine ligand-gated receptors

Expert Solution

Step 1

Heart:

The heart is divided into 4chambers.
The 2 chambers on the top celled atrium and the 2 chambers on the bottom called ventricles, one on each side of the heart.
2 large veins deliver the oxygen-poor blood to the right atrium.
The superior vena cava carries blood from the upper body.
The heart has 2 nodes which are instrumental in cardiac conduction.
These nodes are the electrical system which powers the cardiac cycle.
The 2 nodes of the heart are the sinoatrial (SA) node and the atrioventricular (AV) node.

Neuron:

Neuron is defined as the fundamental unit of the nervous system, which transmits information to different parts of the body.

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