How does the diameter of blood vessels corralate to resistance to flow?
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Larger the diameter = less resistance
Smaller diameter = more resistance
Calculating cardiac output (CO)?
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Heart rate *stroke volume
(70bpm * 70 ml = 4900 ml/m or 4.9 L/m
Why is there more than one group of pacemaker cells in the heart? Give the groups,
what they do, and the rate they have
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-SA node is primary for heart and fastest rate
-AV node is backup for SA node damage and has slower rate than SA
-AV bundle is backup for AV node and is slower than AV
What are the 2 types of contractions found in cardiac muscle and describe each
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1 isovolumic contraction (point up to which volume decreases
2 isotonic contraction (point at which heart volume starts to decrease)
**muscle wraps around the heart, when it contracts, inside volume
decreases
What order does blood go through the 3 main blood vesses associated with the
heart?
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, Heart
Arteries (hightest pressre)
Arterioles
Capillaries
Venles
Veins
Vena Cavae (lowest pressure)
Heart
Flow rate:
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Volume of blood over time
(What we usually mean when we talk about flow)
** same volume of blood in same period of time
What are the 3 main points of a heart beat on EKG and describe what is happening
during each for (electrical) and mechanical
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-P wave
(Atrial depolarization)
*atria contract
-QRS complex
(Ventricular depolarization, atrial repolarization)
*Ventricles contract, atria relax
-T wave
(Ventricular repolarization)
*ventricles relax
Give this one a try later!
Larger the diameter = less resistance
Smaller diameter = more resistance
Calculating cardiac output (CO)?
,Give this one a try later!
Heart rate *stroke volume
(70bpm * 70 ml = 4900 ml/m or 4.9 L/m
Why is there more than one group of pacemaker cells in the heart? Give the groups,
what they do, and the rate they have
Give this one a try later!
-SA node is primary for heart and fastest rate
-AV node is backup for SA node damage and has slower rate than SA
-AV bundle is backup for AV node and is slower than AV
What are the 2 types of contractions found in cardiac muscle and describe each
Give this one a try later!
1 isovolumic contraction (point up to which volume decreases
2 isotonic contraction (point at which heart volume starts to decrease)
**muscle wraps around the heart, when it contracts, inside volume
decreases
What order does blood go through the 3 main blood vesses associated with the
heart?
Give this one a try later!
, Heart
Arteries (hightest pressre)
Arterioles
Capillaries
Venles
Veins
Vena Cavae (lowest pressure)
Heart
Flow rate:
Give this one a try later!
Volume of blood over time
(What we usually mean when we talk about flow)
** same volume of blood in same period of time
What are the 3 main points of a heart beat on EKG and describe what is happening
during each for (electrical) and mechanical
Give this one a try later!
-P wave
(Atrial depolarization)
*atria contract
-QRS complex
(Ventricular depolarization, atrial repolarization)
*Ventricles contract, atria relax
-T wave
(Ventricular repolarization)
*ventricles relax
