Answer:
Atrial flutter is a type of abnormal heart rhythm, or arrhythmia. It occurs when a short circuit in the heart causes the upper chambers (atria) to pump very rapidly. Atrial flutter is important not only because of its symptoms but because it can cause a stroke that may result in permanent disability or death.
Answer:
1. George O’Malley (Season 5, Episode 24)
The world collectively gasped when George was revealed to be on the other side of the elevator doors, dressed in his Army uniform, ready to guide Izzie (Katherine Heigl) to the afterlife. This intense Season 5 ending was the audience’s first time witnessing the death of a main circle doctor, forever raising the stakes to come. From Callie recognizing the freckle, to John Doe tracing “007” into Meredith’s palm, each moment created goosebumps. The underdog of the interns didn’t deserve to go out being dragged under a bus, but it’s only fitting that he did it to save someone else’s life.
2. Denny Duquette (Season 2, Episode 27)
Love makes people do crazy things; but, unfortunately cutting L-Vad wires, breaking the law, and Izzie almost losing her job couldn’t save Denny Duquette from death. Isabel and Denny’s love story was the first flame that could’ve shone brighter than Meredith and Derek’s. It’s largely why the death of Denny was so heartbreakingly tragic. Although Izzie seemed to move on, Denny’s ghostly cameo in Season 5 made it clear the love story was always doomed.
Explanation:
Answer:
a. in the bottom of the atrium just above the ventricles
Explanation:
AV node -
It helps to control the heart rate , it serves as an electrical relay station , reduces the electrical current which is sent by the SA node .
The location of the AV node , is at the lower back section of the inter atrial septum , and conducts the electrical impulse normally from the atria to ventricles .
Answer:
A) bind to receptors in the nucleus of their target cells.
Explanation:
Steroid hormones are synthesized from cholesterol and are lipids, therefore they cannot be transported in the blood dissolved in the plasma. They are associated with transport proteins to travel in blood.
Because they are lipids, they can diffuse through cell membranes, and once inside the target cell they bind to receptors in the cytoplasm or the nucleus and alter gene expression.
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