0
What else can I help you with?
What characterizes the normal operation of the heart?
each part contracts in a specific order. Contraction of the muscle is triggered by an electrical impulse. These electrical impulses travel through specialized cells that form a conduction system. Following this pathway ensures that contractions will
What critical role does the nodal system play in heart physiology?
Normal impulse conduction
Where does the electrical impulse of the heart get lost in the body?
the skin
What is bundle branch block in a heart?
A bundle branch block, (or BBB,) is a common problem with the heart. Indeed, it often isn't really much of a problem! The heart is composed of special muscle tissue that is sensitive to electricity. There are four chambers of the heart that the blood moves through. Since blood follows the same path through the heart, and it takes time for blood to move from one chamber to another, the electrical signal that triggers the heart to contract needs to follow a specific route so the right tissue can contract at the right time. Very basically, it works like this: 1) An electrical impulse is generated at the sino-atrial (SA) node, which is near the top of the heart. This causes the top chambers (the atria) to contract, pushing blood down into the bottom chambers (the ventricals.) 2) The impulse moves downward from the SA node to the atrioventricular (AV) node, which sends the impulse further down to prompt ventricular contraction. 3) From the AV node, the current runs into the Bundle of His (h-i-s-s), which splits into two halves - the right bundle and (wait for it...) the left bundle. 4) Both bundles carry the impulse to the terminus of the conduction pathway, the perkinjie (per-kin-gee) fibers. A bundle branch block occurs when there is impedence in the conduction of the impulse. That is, the electric impulse is slowed or stopped. Because heart tissue can make and conduct its own electrical impulse, a blockage is usually compensated for by literally rerouting the impulse through the heart tiisue itself. A slowing of the signal may make an EKG look different, but it's usually not that big of a deal. Keep in mind that this is a very basic description of how the heart's electrical conduction works. More can be found on the web pretty easily.
The electrical impulse that causes the heart to contract is generated in the right atrium at the?
Sinoatrial, or SA node.
Is the velocity of a nerve impulse greater than electrical conduction's?
yes
Is the term for a delay or interruption in conduction of the electrical impulse in the myocardium?
The term for a delay or interruption in conduction of the electrical impulse in the myocardium is "heart block." Heart blocks can range from first-degree (mildest) to third-degree (most severe) based on the extent of conduction disruption in the heart's electrical system.
Can the depressant effect of alcohol interfere with the conduction of the electrical impulse of the heartbeat?
false
What is the difference between impulse conduction and transmission?
Impulse conduction refers to passage of impulse within the same cell. Where as transmission as the name implies, is concerned about passage of impulses either chemical or electrical from one cell to another.
When does the human heart rest?
The electrical impulse reaches all the muscle tissue in the ventricles, and the ventricles contract. This electrical conduction pattern occurs approx. every 0.8 seconds.
What is the membrane of a nerve cell is comprised of?
Its main function is to propagate the action potential (the 'impulse') along the length of the axon.
What is impulse conduction?
Party of nervous
What tissue type functions in impulse conduction?
Nervous tissue functions in impulse conduction. It consists of neurons that transmit electrical signals or impulses throughout the body. The specialized structure of neurons, including dendrites, axons, and synapses, enables them to rapidly transmit information.
What is impulse conduction is fastest in neurons?
Impulses that travel along myelinated neurons are the fastest.
The speed at which a neural impulse travels is increased when the axon is encased by an?
insulating layer called myelin sheath. This myelin sheath helps to speed up the conduction of electrical impulses along the axon by allowing the impulse to jump between nodes of Ranvier, known as saltatory conduction.
How does body temperature affect the conduction speed of an electrical impulse?
An increase in body temperature can lead to faster conduction speed of electrical impulses in the body due to improved nerve function and reduced resistance in the nerve fibers. Conversely, a decrease in body temperature can slow down conduction speed as nerve function is impaired.
What impulse conduction is the fastest in neurons?
Axons conduct the nerve impulses. Dendrites receive the impulses. Possible the impulses go through the dendrites faster, though the synaptic cleft may slow this pathway. Dendrites are much shorter than axons.
