Heart Contraction Overview

Which type of cardiac muscle cells contract spontaneously?

What is the role of non-automatic cells in the heart?

Which cells make up the majority of cardiac myocytes in the heart?

What happens when the automatic cells of the heart contract?

How do non-automatic cells in the heart start contracting?

Automatic cells in the heart do not require external stimuli to initiate contractions.

Non-automatic cells in the heart are responsible for initiating the contractions of automatic cells.

Most of the cardiac myocytes in the heart are non-automatic cells.

Automatic cells contract first in the heart, followed by non-automatic cells.

Non-automatic cells rely on the automatic cells to be stimulated mechanically in order to start contracting.

What is the characteristic of automatic cells in the heart?

What is the primary role of automatic cells in the heart?

Why do non-automatic cells in the heart require signaling from automatic cells?

What is the result of automatic cells contracting in the heart?

What percentage of cardiac myocytes in the heart are non-automatic cells?

Your heart beats regularly on it's own without you having to think about it ______

There are two types of cardiac ______ cells (myocytes):

Non-automatic cells = do not spontaneously ______, they require their contractions to be initiated by the automatic cells

When the automatic cells ______, they signal to the non-automatic cells contract

Most cardiac ______ are non-automatic cells

Match the characteristics of cardiac muscle cells with their definitions:

Match the types of cardiac muscle cells with their roles in the heart's contraction:

Match the cardiac muscle cells with their contraction mechanisms:

Match the characteristics of the heart's contraction with the type of cardiac muscle cells involved:

Match the descriptions with the types of cardiac muscle cells:

What is the typical location of the Sinoatrial node in the heart?

What is the function of the signal sent by the Sinoatrial node?

What is the characteristic of the baseline rate of contraction of the Sinoatrial node?

What is the next step in the cardiac cycle after the signal from the Sinoatrial node reaches the atrioventricular node?

What is the significance of the Sinoatrial node in the cardiac cycle?

The Sinoatrial node is responsible for initiating ventricular contraction.

The atrioventricular node is located in the right atrium.

The Sinoatrial node has a fixed rate of contraction that cannot be altered.

The Sinoatrial node is a bundle of non-automatic cells.

The cardiac cycle starts with ventricular contraction.

The Sinoatrial node is a bundle of ______ cells that controls the heart rhythm and rate.

The Sinoatrial node is located at the junction of the ______ vena cava and the right atrium.

The Sinoatrial node sends out a signal that causes both ______ to contract.

The signal from the Sinoatrial node then spreads to the ______ node in the atrioventricular septum.

The ______ cycle starts with the contraction of the atria, followed by the contraction of the ventricles and then relaxation.

What is the purpose of the closure of the AV valves during ventricular contraction?

During which part of the cardiac cycle do the semilunar valves close?

What is the resulting sound of the closure of the AV valves?

What is the function of the closure of the semilunar valves?

What do the 'Lub' and 'Dub' sounds represent during auscultation of the heart?

What is the purpose of the closure of the AV valves during ventricular contraction?

During which part of the cardiac cycle do the AV valves close?

What is the resulting sound of the closure of the semilunar valves?

What is the function of the closure of the semilunar valves?

When do the semilunar valves close in the cardiac cycle?

What is the purpose of the heart's cardiac cycle?

What happens during ventricular contraction in the cardiac cycle?

What is the significance of the 'Lub' sound during auscultation of the heart?

What occurs during diastole in the cardiac cycle?

Why is it important to maintain blood pressure within a range?

What is the relationship between systole and diastole?

What is the main function of the AV valves in the cardiac cycle?

What occurs during the beginning of systole in the cardiac cycle?

What is the relationship between the 'Lub' and 'Dub' sounds during auscultation of the heart?

What is the characteristic of ventricular contraction in the cardiac cycle?

What is the purpose of the cardiac cycle?

What is the difference between systole and diastole?

During ventricular contraction, the AV valves close to prevent blood flow back into the atria.

The 'Lub' sound is due to the closing of the semilunar valves during the cardiac cycle.

During diastole, the ventricles empty into the aorta and pulmonary arteries.

The 'Dub' sound occurs during ventricular relaxation at the end of systole.

The cardiac cycle consists of atrial contraction immediately followed by ventricular contraction.

Blood pressure is considered high during diastole and low during systole.

Match the heart sounds with their corresponding valve closure:

Match the phases of the cardiac cycle with their corresponding blood pressure:

Match the characteristics of the cardiac cycle with their corresponding descriptions:

Match the valves with their corresponding functions in the cardiac cycle:

Match the cardiac cycle events with their corresponding phases:

Match the cardiac cycle phases with their corresponding pressures:

During ventricular contraction, the ______ valves snap shut

The 'Lub-Dub' sounds heard when auscultating the heart are due to the ______ snapping shut

The 'Dub' sound occurs during ventricular ______ at the end of systole

It is important that blood pressure is maintained within a range to prevent having a pressure that is too high or too ______

During diastole, the ventricles fill up with blood from the ______

Systole in the cardiac cycle is characterized by ventricular ______ into the aorta/pulmonary arteries