Antidepressants can work to increase GR levels in affected patients, suppressing depressive symptoms . depolarizes a number of neurons throughout the brain, resulting in the increased activity of a number of intracellular pathways.
22.
Summation is the convergence of many EPSPs at the axon hillock ( either from a single neuron firing at a high frequency or from many neurons firing at once ) that depolarizes the membrane potential to the point of threshold.
23.
These channels open temporarily to allow neurons to " reset " after they fire; lolitrem B blocks them, preventing the neuron from firing again after it depolarizes, which at low doses leads to tremors and at high doses to paralysis and death.
24.
Under normal conditions, the heart's sinoatrial node determines the rate by which the organ beats-in other words, it is the heart's " pacemaker . " The electrical activity of sinus rhythm originates in the sinoatrial node and depolarizes the atria.
25.
This means the heart depolarizes without any external influence via a slow, positive increase in voltage known as the pacemaker potential across the cell's membrane ( the membrane potential ) that occurs between the end of one action potential and the beginning of the next action potential.
26.
In these cells, the phase 4 is as the image 2 shows : the membrane slowly depolarizes until it reaches its threshold pacemaker potential ( around-40mV ), or until it is depolarized by an electrical impulse coming from another cell, such as the sinoatrial node.
27.
Lawrence supported student innovation including bVIEW ( Brandeis Visions for Israel in an Evolving World ), a conference by and for college students focused on future-oriented programming that depolarizes campus conversations about Israel, and Deis Impact, Brandeis annual student-run festival of social justice.
28.
An activation of smooth muscle cells through caffeine activates ryanodine receptors of the sarcoplasmic reticulum, whereas an activation through high levels of extracellular potassium depolarizes the membrane ( due to the change of the reversal potential for potassium towards more positive values ) and would then activate voltage-gated calcium-ion channels leading to high levels of intracellular calcium ions.
29.
The action potential generated by the SA node passes down the electrical conduction system of the heart, and depolarizes the other potential pacemaker cells ( AV node ) to initiate action potentials before these other cells have had a chance to generate their own spontaneous action potential, thus they contract and propagate electrical impulses to the pace set by the cells of the SA node.
30.
"' Premature atrial contractions ( PACs ) "', also known as "'atrial premature complexes ( APC ) "'or "'atrial premature beats ( APB ) "', are a common cardiac dysrhythmia characterized by premature heartbeats originating in the another region of the atria depolarizes before the sinoatrial node and thus triggers a premature heartbeat.
