What are the fastest and slowest tissues in the heart muscle and what does it mean?

Hello, according to your description, cardiomyocytes.

The slowest conduction velocities are cells in the atrioventricular junction. The atrioventricular junction conduction velocity is the slowest and the delay time is about seconds, which is conducive to ventricular activity slightly later than the atrium, which facilitates the flow of atrial blood into the ventricles and allows the ventricles to have enough time to fill during systole. Excited, after passing through the atrioventricular junction, the atrioventricular tract and Purkinje fibers conduct the fastest, which makes the ventricular muscle fibers.

Excitation and contraction occur almost simultaneously, thus exerting extreme pressure on blood flow in the ventricles and facilitating ventricular ejection. The conduction velocity of Purkinje fiber is four meters per second, which is the fastest conduction velocity among cardiomyocytes. I hope my advice will help you, and I wish you a speedy **!

What is the slowest conduction velocity in cardiomyocytes?

The fastest conduction velocity of cardiomyocytes is the Pokenye fiber.

The conduction velocity of Purkinje's fibers is 4 m s. The atrioventricular junction conduction velocity is the slowest. The delay time is about seconds.

This delay in time causes the ventricles to move slightly later than the atria, allowing blood to flow into the ventricles and allowing the ventricles to fill up before contraction. After the excitation passes through the atrioventricular junction, the atrioventricular bundle and Purkinje's fibers conduct the fastest, which causes the ventricular muscle fibers to excite and contract almost simultaneously, thus exerting great pressure on the blood in the ventricles, which is conducive to ventricular ejection.

Answer]: B Generally, the conduction velocity of the atrial muscle is slower (about 0 4m s), the conduction velocity of the ventricular muscle is about 1m s, and the conduction velocity of the ventricular conduction tissue is much higher, and the conduction velocity of peripheral Platts fibers can reach 4 m s, but the conductivity of the cells in the atrioventricular junction area is very low, and the nodal area is the lowest, and the conduction velocity is only 0 02 m s.

Answer]: B cardiomyocytes can be divided into fast-reacting cells and slow-reacting cells, and slow-reacting cells include cells in the sinus node and atrioventricular junction area, and their action potential characteristics are: extremely slow removal, small amplitude, and short time course.

Among them, the nodal cells at the junction of the atrioventricular file have no automaticity and the slowest conduction velocity.

Answer]: The conductivity of myocardium is related to the structural characteristics of myocardial cells. The larger the cell diameter and the smaller the intracellular longitudinal resistance, the faster the electrotension potential is formed, and the faster the conduction velocity or slag of excitation.

In the cardiac conduction system, Purkinje cells have the largest diameter and the fastest conduction velocity of excitation. Therefore, choose E for question 1. The high and low degree of myocardial autonomic autonomic refers to the frequency of auto-excitation of myocardial cells.

The intrinsic frequency of sinus node cells is the highest, about 100 times, so C is selected for 2 questions.

The slowest conduction velocity in the heart is ().

a.Purkinje Fibers.

b.Xinhong atrial muscle.

c.Atrioventricular junction.

d.Ventricular muscle.

e.Atrioventricular bundle.

Correct answer to empty uproar: c

Answer]: e Analysis: Purkinje fibers are the fastest part of the heart that conducts excitatory conduction, and the slowest is the atrioventricular junction. Collapse to master the knowledge points of "blood circulation, rotten clothes, and elimination".

The slowest excitatory conduction velocity in myocardial tissue is ()aSinoatrial node.

b.Atrioventricular knot.

c.Atrioventricular bundle.

d.Purkenye's Slim Dan Annihilation Wei shouted late.

Correct answer: B