Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 12

Cardiac Cycle

Systole Contraction of the heart muscles
Diastole Relaxation of the heart muscles
Phases of contraction Atrial systole, ventricular systole, and atrial and ventricular diastole
Lub The lub sound of the heart is caused by the closure of both AV valves (bicuspid/tricuspid), this occurs at the end of atrial systole.
Dup The dup sound of the heart is caused by the closure of both semilunar valves of the heart. This occurs at the end of ventricular systole.
HR (Heart Rate) The number of times the heart beats in a minute.
SV (Stroke Volume) The amount of blood pumped by a ventricle each time it contracts.
Cardiac output Cardiac output = Heart rate X stroke volume.
Cardioregulatory Center This part of the medulla oblongata, in the brain, controls how fast the heart beats. Parasympathetic signals caused the heart to slow down and sympathetic signals cause the heart rate to increase.
P Wave of ECG Depolarization (Systole) of the atria
QRS Complex of ECG The depolarization (Systole) of the ventricles. The atria are in diastole at this time but it is not seen on the ECG.
T Wave of ECG The repolarization (Diastole) of the ventricles.
Ateries Carry blood away from heart. (3 layers: tunica intima, tunica media, tunica externa)
Arterioles Small arteries that can constrict and relax to distribute blood flow.
Cappiliaries Microscopic blood vessels used for gas/solute exchange.
Veins Carry blood toward the heart.
Blood Pressure The force of blood against the walls of blood vessels.
Hypotension Low blood pressure
Hypertension High Blood Pressure
Created by: Mr.Klein