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What is the difference between depolarizing and non-depolarizing drugs?
Depolarizing neuromuscular blocking drugs, like succinylcholine, cause initial depolarization of the muscle cell membrane followed by prolonged depolarization. Non-depolarizing drugs, like rocuronium, block the action of acetylcholine at the neuromuscular junction without causing depolarization.
What happens in the cardiac cycle immediately before P wave?
Immediately before the P wave in the cardiac cycle, the atria contract (atrial systole), pushing blood into the ventricles. This phase is called atrial depolarization. The P wave represents the depolarization of the atria on an electrocardiogram (ECG).
What is the plural of atrium?
The plural is atria. This can be used architecturally or with reference to chambers of the heart.
The atrioventricular valves are closed during the entire period of?
The atrioventricular valves are closed during the entire period of ventricular contraction to prevent blood from flowing back into the atria. This closure ensures that blood is pushed out of the ventricles and into the arteries.
What is the difference between atria and atrium?
The term "atria" refers to the plural form of the word "atrium," which is a chamber of the heart that receives blood from the veins. The atria are the upper chambers of the heart, while the ventricles are the lower chambers responsible for pumping blood out of the heart.
The p in an electrocardiogram sHow is what?
The P wave is the first wave in an ECG complex, and it results from the atria depolarizing. It may not be present in arrhythmias where the atria do not necessarily depolarize, such as junctional or ventricular escape rhythms, and at times when the atria are depolarizing abnormally this will be reflected in the P wave's replacement by abnormal waves, such as the low-amplitude "squiggle" seen in atrial fibrillation, or the "sawtooth" pattern seen in atrial flutter.
The period during which the ventricles are depolarizing which precedes their contraction?
QRS wave
What causes there to be no p wave on an EKG?
The absence of a P wave on an EKG could indicate an issue with the electrical impulse formation in the atria of the heart, such as in atrial fibrillation where the atria are not depolarizing in a coordinated manner. Other possible causes include atrial flutter, junctional rhythm, or ectopic atrial beats. Further evaluation by a healthcare professional is necessary to determine the underlying cause.
When the chemically gated ion channels open which ion is mainly responsible for depolarizing the sarcolemma?
The main ion responsible for depolarizing the sarcolemma is sodium (Na+).
Are auricles extensions of the atria or the ventricle?
The are extentions of the Atria.
What is the downstairs chamber in the heart?
the atria
A depolarizing graded potential?
A depolarizing graded potential is a change in membrane potential that makes the inside of the cell less negative. This can occur due to the influx of positively charged ions such as sodium into the cell. Depolarizing graded potentials are involved in generating action potentials in excitable cells.
What is the purpose of a depolarizing agent in a battery?
The term depolarizing agent has been used to denote a substance used in a primary cell to prevent buildup of hydrogen gas bubbles.A battery depolarizing agent takes up electrons during discharge of the cell; therefore, it is always an oxidizing agent.
Period of heart contraction?
Contraction of the ventricles and atria is called systole. Relaxation is called diastole.
What system has the atria?
The atria are a part of your heart which is in the circulatory system
What does eshmeron mean?
It is a non-depolarizing muscle relaxant, apparently.
What are the top two chambers of the heart called?
The Atria and Atrium
