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What is the correct pathway that the impulse takes through the ventricles?
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How an impulse can continue to travel along a nerve pathway when there's a gap between two neurons?
Nerve pathways are slim, however neurones are small in size therefore the total amount of atoms in the impulse is enough to fit through a gap in the pathway of neurons
What pathway does the blood flow when the ventricles undergo contraction?
When the ventricles contract, the right ventricle pushes blood up through the pulmonary semilunar valve into the pulmonary arteries via the pulmonary trunk, and the left ventricle pushes blood up through the aortic semilunar valve into the Aorta.
How does movement of electrical impulse relate to the contraction of the chambers of the heart?
The impulse shocks the left and right atria of the heart. This pumps blood into the left and right ventricle. The ventricles then receive the impulse and pump the blood. The movement of the electrical impulse allows the blood to move through multiple areas of the heart with only one impulse.
Why does the heart have the Bundle of His and the Purkinje fibers?
The bundle of His and the Purkinje fibres are part of the conduction system of the heart. In order to pump blood around the body, the heart muscle must contract (atria first to fill the ventricles, then ventricles contract to send the blood around the body.) The conduction system starts in the sinoatrial node (SA node) which is also known as the hearts natural pacemaker and is located at the top of the right atrium. The impulse is then sent to the atrioventricular node (AV node) located by the junction between the atria and ventricles. The next part of the conduction system is the bundle of His which sends the impulse from the atria to the ventricles. The purkinje fibres then spread through the ventricles. As the impulse passes through each part of the conduction system, that part of the heart is excited and the heart muscle contracts, which gives the pumping action of the heart.
Describe the pathway of nerve impulses through the heart?
The normal, or natural, pacemaker of the heart is the sinoartial node, it passes the action potential to the ventricular node, which slows it down long enough for the ventricles to fill up with blood. Then the second contraction is triggered by the action potential traveling down the Bundle of His, or atrioventricular bundle, and then spread out the signal to the Purkinje fibers which transmit the action potentiall to all parts of the ventricles.
What is the QRS spike of an ECG mean?
a group of waves depicted on an electrocardiogram; it actually consists of three distinct waves created by the passage of the cardiac electrical impulse through the ventricles and occurs at the beginning of each contraction of the ventricles. In a normal electrocardiogram the R wave is the most prominent of the three; the Q and S waves may be extremely weak and sometimes are absent.
How does a circulatory system moves the blood like a circle through a body?
The heart's SA node sends an impulse to make both atria contract. This makes both atria squeeze the blood into the ventricles directly below them. Then, the heart's AV node receives the impulse and pumps the blood out of the ventricles.
How does electricity move through the heart?
The electrical impulse is generated in SA node. It travels along the walls of the atria. Then it reaches the AV node. Here the impulse is slowed down for some time. Then it enters the bundle of His. It rapidly passes down to left and right bundle branches. Then the impulse spreads to the muscle fibers of the walls of the ventricles, including the papillary muscles.
What are function of SA nodes?
There is only one SA(sinoatrial) node. It is located by the right atrium of the heart. it initiates the nerve impulse which travels through both atria to initiate atrial contraction. Then the impulse travels to the AV(atrial ventricular) node. the nerve impulse travels through the intraventricular septum to the apex of the heart, where it initiates the contraction of the ventricles(starting from the apex and squeezing the blood up and out of the arteries).
Is a circuit the pathway taken by electric current?
Yes the circuit needs to have no breaks or have the switch open to let the electrons pass through.
Right bundle branch block side affects?
In patients with right bundle branch block (RBBB), the nerve impulse is conducted slowly or not at all. The right ventricle finally receives the impulse through muscle-to-muscle spread, outside the regular nerve pathway.
What is the correct order that information passes through in a neuron?
The flow of information across nerve cells is called a nerve impulse in which the axons of the cell must depolarize, repolarize and go through a refractory period before reaching the resting potential. At this point, another impulse can occur.
