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Lecture 22
Exam 2
29
Physiology
Undergraduate 2
06/12/2010

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Cards

Term
Describe the cardiac cycle
Definition
Sequence of contraction and relaxation
Term
How many valves does the heart have?
Definition
4
Term
When the heart is diastole what state is the heart in?
Definition
relaxed state.
Term
When your heart is in the diastole state what is it time for?
Definition
filling
Term
Whats the volume of the diastolic?
Definition
130 ml
Term
What contrasts first- ahead of ventricles?
Definition
Atrial systole
Term
Atrial systole completes filling of what?
Definition
Ventricles
Term
What follows atrial contraction?
Definition
ventricular systole
Term
Which way does the contraction spread in the ventricular systole?
Definition
upward
Term
What pressure must be greater than aorta to open aortic valve?
Definition
ventricular systole
Term
With aortic pressure, high blood pressure puts greater load on what?
Definition
heart
Term
About how much blood is ejected from the blood every beat?
Definition
between 70-90 ml of blood
Term
what does it mean when you have a lower heart rate?
Definition
it means higher ejected volume
Term
How can you find the max heart rate?
Definition
220-age= max heart rate
Term
What is the life threatening issue with heart rate?
Definition
rates above 180 decrease filling time.
Term
Non laminar flow means what?
Definition
sound when valves should be closed
Term
In valve stenosis the valve is stiff and has what else?
Definition
small opening
Term
Turbulent flow as what squirts through?
Definition
blood
Term
Children with heart murmur often times can do what with the murmur?
Definition
Out grow it.
Term
Venous return
Definition
amount of blood entering heart during diastolic phase
Term
What is cardiac output?
Definition
amount of blood pumped per min
Term
How many liters of blood does the body have?
Definition
5
Term
how long does it take the blood to circulate through the body?
Definition
1 minute
Term
In neural influences what changes?
Definition
Stroke volume and heart rate.
Term
What is dominant at rest?
Definition
Parasympathetic
Term
If you cut the vagus nerve what will happen?
Definition
Heart rate will go up immediately
Term
In the sympathetic system what will increase and cause the channel to open up?
Definition
calcium
Term
When depolarization speeds up what happens to heart rate?
Definition
it increases as well
Term
When there is more calcium there is more force which increase what else?
Definition
Stroke volume.
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