NUR 133 Exam 3
- veins vs arteries
Answer
Veins carry blood to the heart, and arteries carry blood away from the heart.
- What are the 4 chambers of the heart?
Answer
right atrium, right ventricle, left atrium, left ventricle
- What is the blood flow through the heart?
Answer
right atrium --> tricuspid valve--> right ventricle --> pulmonic valve--> lungs--> left atrium--> mitral valve--> left ventricle--> aortic valve--> body
- What happens in diastole?
Answer
ventricles relax and fill with blood
- What happens in systole?
Answer
ventricles contract that causes AV valves to close preventing backflow 1 / 2
Myocardium causes ventricular contraction
- The SA node does what?
Answer
controls heart beat, sends impulse to the AV node Discharged 60-100 BPM
- If the SA node fails, what takes over?
Answer
AV node (40-60 bpm)
- If the AV node fails, what takes over?
Answer
Bundle of His. This can only last a short time. 20-40
- The peripheral vascular system maintians what?
Answer
Blood pressure by constrict- ing/dilating in response to stimuli
- What are 4 symptoms of arterial deficiency/disease?
Answer
Capillary refill > 3 seconds
Edema
Answer
- / 2