Cardiovascular 2 Flashcards
Renin-angiotensin mechanism increases the reabsorption of sodium and water to restore blood volume and increase blood pressure
True
Most influential factor to blood flow resistance
Diameter of blood vessels
What determines cardiac output
Heart Rate
Which of the following factors converts fibrinogen into fibrin in the final step of coagulation
Thrombin
Conduction system of the heart in correct order
Sinoatrial node
Atrioventricular node
AV bundle of his
Right and left bundle brunches
Purkinje fibers
What is the correct Equation for cardiac output?
Cardiac output equals stroke volume times heart rate
Atrioventricular valves close
Systole
Intra ventricular pressure increases
Systole
Blood rushes into great arteries
Systole
Semilunar valves close
Diastole
Difference in pressure forces blood flow
True
HR and strength of contraction are controlled by the cardiovascular centre located in the
Brainstem
Which of the following occur during ventricular diastole
The artrioventricular valves open
Clot retraction
Compacts the blood clot drawing torn edges of the damaged vessel closer together
Blood flows through vessels due to
Pressure gradient
Autoregulation affects the
Precapillary sphincters
Arterioles
Which of the following has influenced in the resistance to blood flow in adults
Blood vessel diameter
Which of the following breaks down fibrin/clots
Plasmin
Intrinsic
Pathway is activated by platelets adhering to exposed collagen fibers in the blood vessel lining
Extrinsic
Pathway is initiated by damaged cells outside of the blood vessel
Common
Pathway begins with activation of prothrombin activator
Which of the following is referred to as the pacemaker of the heart
Sinoatrial node (SA)
Clotting factors are always available
True
Renin-angiotensin mechanism leads to the formation of angiotensin II stimulates
Release of aldosterone
Vasoconstriction
Release of ADH
Which of the following facilitate venous blood flow back to the heart
Sympathetic Action
Skeletal muscle pumps
Respiratory pumps
Which of the following occurs during ventricular systole
Semi-lunar valves are forced open by increasing intraventricular pressure
Hemorrhage (significant blood loss) would stimulate
An increase in sympathetic activity
Activation of renin-angiotensin mechanism
Which of the following correctly depicts the relationship between cardiac output (CO), blood pressure (BP) and vascular resistance (TPR)?
BP = CO X TPR
The semilunar (SL) valves open due to
Pressure in the ventricles exceeding pressure in the aorta and pulmonary trunk
Which of the following factors affect stroke volume (SV)?
Great artery diameter
Sympathetic innervation
Blood Volume
Which of the following are important factors in determining blood pressure?
Heart Rate
Total peripheral resistance (TPR)
Two atria of the heart contract together just before the ventricles contract
True
The intrinsic conduction system of the heart
Generates a continuous HR without intervention
Heart rate (HR) and strength of contraction (contractility) are controlled by the cardiovascular centre located in the:
Brainstem
Parasympathetic activity increases heart rate (HR)
False
Release of Aldosterone and ADH
Increase BP
Increased parasympathetic activity
Decrease BP
Decrease in HR
Decrease BP
Increase in blood volume
Increase BP
Decrease TPR
Decrease BP
Increase HR
Increased BP
Renin-angiotensin mechanism
Increase BP
Increased sympathetic activity
Increase BP
Release of atrial naturetic peptide (ANP
Decrease BP
