T/F: The blood loses CO2 and picks up O2 in the pulmonary capillaries
true
,What is the 10 step pathway of blood flow through the heart?
1. right atrium
2. right ventricle
3. pulmonary trunk/arteries
4. pulmonary capillaries
5. pulmonary veins
6. left atrium
7. left ventricle
8. aorta and systemic capillaries
9. systemic capillaries
10. superior vena cava/inferior vena cava/coronary sinus
T/F: In systemic capillaries, blood loses O2 and gains CO2
true
Which side of the heart is oxygenated? Deoxygenated?
right = deoxygenated; left = oxygenated
How does blood flow from the right atrium to the right ventricle?
via tricuspid valve
How does blood flow from the right ventricle to the pulmonary trunk?
pulmonary valve
How does blood flow from the left atrium to the left ventricle>
bicuspid valve
how does blood go from left ventricle to aorta?
aortic valve
What starts cardiac excitation?
SA node
What structure is the sinoatrial node found?
in right atrial wall
, What structure is the atrioventricular node found?
interatrial septum
What happens to action potentials at the AV node? Why?
at the AV node action potentials slow down considerably providing time for the atria to
empty blood into the ventricles
How does and EKG work?
the conduction of action potentials create electrical currents in the heart that are
picked up and recorded through electrodes
What are the 3 waves that accompany each heartbeat?
P wave; QRS wave; T wave
What does the P wave represent?
atrial depolarization
T/F: Depolarization causes contraction
true
How does the P wave show up on an EKG?
as a small upward deflection
How does the QRS complex show up on an EKG?
1. Q wave is a downward deflection
2. R is an upright triangular wave
3. S is a downward wave
What does the QRS complex represent?
the onset of ventricular depolarization when the ventricles start to contract
What does the T wave represent?
ventricular repolarization
How does the T wave show up on an EKG?
a dome-shaped upward deflection
What is cardiac output?
the amount ejected by each ventricle in 1 minute
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Easton. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.