Sentences with phrase «electrical impulses cause»

The electrical impulses cause the heart to contract in a coordinated fashion: the atria contract first and push blood into the ventricles; then the ventricles contract and push blood to either the lungs or the rest of the body.

Electrical impulses cause the molecular structure of the glass to change at continuously varying levels between light and dark according to preference.

Not exact matches

Atrial fibrillation occurs when electrical impulses in the upper chambers of the heart, called the atria, become chaotic and cause an irregular heartbeat.

When stimulated, the channels open and sodium rushes in changing the chemical gradient (middle, below), which in turn causes nearby channels to open and so on; if the neuron reaches a certain threshold of open channels, it fires an electrical impulse.

This electrical current stimulates the brain cells (neurons) in a targeted brain area and causes them to fire (or send an electrical impulse).

Seizures are caused by abnormal electrical impulses in your puppy's brain, which can have a variety of causes.

A small area of special tissue in the right atrium called the sinoatrial (SA) node starts an electrical impulse (it's like the heart's spark plug) that will eventually travel down special electrical tracts (AV node, Bundle Branches, Purkinje Fibers — the heart's «wiring») within the heart and cause the heart muscle to contract (see Figure 2 below).

Graphic representation of atrial fibrillation with whirlwind of electrical impulses forming in the right (RA) and left atria (LA) instead a single organized impulse from the sinoatrial (SA) node causing the atrial muscle to fibrillate (quiver) instead of an organized contraction to fill the right (RV) and left ventricles (LV).

This whirlwind of electrical impulses or wavelets spreads over the atrial tissue causing the atrial muscle to quiver or fibrillate, instead of contracting in an organized, structured manner (Figure 3).

These cells help translate air vibrations caused by sound into electrical impulses that travel to the brain.

Ventricular tachycardia is an arrhythmia that is caused by abnormal electrical impulses that are generated somewhere within the ventricles of the heart.

When this protective sheath is too thin, as in hypomyelination, the electrical impulses can get lost between nerves and cause the nerves and corresponding muscles to malfunction.

These are caused by an imbalance of the chemicals that transmit the electrical impulses in the brain.

These serve to generate and transmit a coordinated electrical impulse that first stimulates the atria and then stimulates the ventricles thus causing the muscle cells in these chambers to contract resulting in pumping of the chambers.

With each heartbeat, an electrical impulse from the sinoatrial (SA) node of the right atrium causes the muscles of the atrium to contract to pump blood.