Chapter 6 Flashcards
Explain the difference between arteries, veins and capillaries
Arteries: carry blood away from heart. Capillaries: site of nutrients and waste exchange. Veins: carry blood from venules back to heart
Explain the difference between arteries and veins in terms of blood oxygenation, including oxygenation within pulmonary circulation.
Right Heart (pulmonary circulation) pumps deoxygenated blood from body to lungs.
Arteries carry deoxygenated
veins carry oxygenated
The (blank) are the receiving chambers
Right and Left Atrium
The (blank #1) receives deoxygenated blood from the body through the (blank #2) and the (blank #3) pumps deoxygenated blood to the lungs through the (blank #4)
1.Right Atrium
2. SA Node
3.Right Ventricle
4. Left Pulmonary Artery
The (blank #1) receives oxygenated blood from the lungs through the (blank #2) and the (blank #3) pumps oxygenated blood to the body through the (blank #4).
- Left Pulmonary Veins
- Left Atrium
- Left Ventricle
- Aorta
The (blank) is a double-walled sac that surrounds the heart
Pericardium
The (blank) has the thickest myocardial tissue due to (blank #2).
- Left Ventricle
- Increase in workload / stress
(Blank) is an oxygen-carrying protein found in red blood cells
Hemoglobin
Write out the blood flow through the heart, including the major arteries and veins, chambers, valves, and delivery location.
Deoxygenated blood from the upper body comes in the superior vena cava and deoxyblood from the lower body comes in the inferior vena cava, the deoxy blood then entersthe RA, once pressure is high the tricuspid valve opens having blood flow into the RV,the tri valve closes to prevent back flow, after the pressure rises in the RV the Pulmonary valve opens allowing blood to flow up the pulmonary trunk (valve closes for same reasons) and then the blood flows out the right and left pulmonary arteries to the lungs. Next oxygenated blood from the lungs flow in the pulmonary veins and into the LA, once pressure builds the mitral valve opens letting the oxygenated blood flow into the LV closing the mitral valve and once pressure builds in the LV the aortic valve opens allowing blood to flow up the ascending aorta and out to the upper body or the blood will flow out the descending aorta to the lower body
Definition of Cardiac Outpt
Cardiac output: total volume of blood pumped per minute
T/F The AV node is the pacemaker of the heart.
False
Why does the AV node delay the signal before it is relayed to the ventricles?
Because Blood flow has to fill into the ventricles
Vagal tone means that the heart is under (Parasympathetic or Sympathetic)
Parasympathetic control
Why is HR higher in individuals who have had a heart transplant?
Because they lose nerve stim which results in Intrinsic HR and 100 BPM.
Explain the role of the PSNS and the SNS in regulating heart rate as we transition from rest to exercise.
@ rest = under parasympathetic control
As you began exercise = decreased in parasympathetic activity = HR will rise
Once you hit 100BMP = 100% sympathetic control
