After leaving the area of the AV node, impulses go through the ...

[itsmyluck]

Which of the following best explains the mechanism called irritability?
◦ The normal pacemaker slows down and gives up control.
◦ The normal pacemaker changes its inherent rate.
◦ A lower pacemaker site speeds up to take control of the heart.
◦ The ventricles repolarize before they are ready.

[pallen55]

A lower pacemaker site speeds up to take control of the heart.

[itsmyluck]

Thank you!

[pallen55]

Always glad to help...

[melly21297]

Which of the following does NOT happen when the sympathetic branch is stimulated?
◦ Impulses go faster through the AV node.
◦ Heart rate increases.
◦ The heart becomes more irritable.
◦ Ventricular conduction slows down.

[Chocorrol77]

Ventricular conduction slows down.

[panfilo]

When an EKG machine is turned on but not yet connected to the patient, the stylus produces a straight line called the ________ line.
◦ equal force
◦ isoelectric
◦ straight
◦ standard

[Andromeda18]

isoelectric

[panfilo]

Thank you!

[Andromeda18]

Always glad to help...