Physiology Concepts - Cardiology Flashcards
1
Q
Intracellular junctions responsible for the cardiac syncytium
A
Gap Junctions
2
Q
Substance that dilates upstream blood vessels
A
Endothelium Derived Relaxing Factor (EDRF) - Nitric Oxide (NO)
3
Q
Most potent VASOCONSTRICTOR
A
ADH (can increase levels of Endothelin I)
4
Q
An INCREASE in VR will INCREASE the HR
A
Bainbridge Reflex
5
Q
INCREASE in VR will INCREASE SV
stretching of cardiac sarcomeres — increase contraction
A
Frank Starling Mechanism
6
Q
HPN, irregular respiration and bradycardia d.t. ACTIVATION of CNS ischemic response and baroreceptor reflex in increased ICP
A
Cushing Reflex
7
Q
Normal pressure at various parts of adult circulation
A
LARGE ARTERIES: <120/80 mmHg SYSTEMIC CAPILLARIES: 17 mmHg VENA CAVA: 0 mmHg PULMONARY ARTERY: 25/8 mmHg PULMONARY CAPILLARIES: 7 mmHg
