N125 Study Guide and Questions Solved 100%
Correct |Verified Answers
Blood is oxygenated through - ANSWER ventilation, perfusion and transportation of
respiratory gases
Neural and chemical regulators - ANSWER control the rate and depth of respiration in
response to changes tissue oxygen demands
Right ventricle - ANSWER pumps deoxygenated blood through pulmonary circulation
Left ventricle - ANSWER pumps oxygenated blood through systemic circulation
Myocardial pump - ANSWER 2 atria and ventricles
Starling's Law - ANSWER - a healthy heart stretches in proportion to the strength of
contraction.
- as myocardium stretches, contraction increases
Myocardial Blood Flow - ANSWER - unidirectional
- 4 valves ensure forward blood flow
Which valves open during ventricular diastole? - ANSWER - Atrioventricular (mitral and
tricuspid)
- S1 is louder
Which valves open during systole? - ANSWER - Semilunar (aortic and pulmonic)
,- S2
Coronary artery circulation - ANSWER coronary artery supplies the myocardium with
nutrients and removes waste
Systemic circulation - ANSWER arteries and veins deliver nutrients and oxygen and
remove waste products
Cardiac Output - ANSWER - amount of blood ejected from left ventricle each minute
- SV x HR
Stroke Volume - ANSWER amount of blood ejected from the left ventricle with each
contraction
Preload - ANSWER end diastolic volume
Afterload - ANSWER - resistance to left ventricular ejection
- diastolic aortic pressure is a good measure
Conduction system - ANSWER originates with SA node --> AV node --> bundle of HIS -->
bundle branches
Autonomic Nervous System - ANSWER influences rate of impulse generation and speed
of conduction pathways
Systemic Nervous System - ANSWER increases the rate of impulse generation and
transmission and innervates all parts of atria and ventricles
, Parasympathetic System - ANSWER decreases rate and innervates atrial, ventricles, SA
node, and AV node
P wave - ANSWER electric activity from SA node through both atria
QRS complex - ANSWER - electrical impulses traveled through the ventricles
- increase in duration indicates a delay in conduction time
QT interval - ANSWER time needed for ventricle depolarization and repolarization
Normal Sinus Rhythm - ANSWER - 60-100 beats per minute
- each beat has a P wave
Sinus Tachycardia - ANSWER - >100 beats per minute
- each beat has a P wave
Sinus Bradycardia - ANSWER - <60 beats per minute
- each beat has a P wave
- not always concerning
Respiration - ANSWER exchange of oxygen and carbon dioxide during cellular
metabolism
Ventilation - ANSWER moving gas in and out of lungs
Inspiration - ANSWER active process stimulated by chemical receptors in the aorta
Correct |Verified Answers
Blood is oxygenated through - ANSWER ventilation, perfusion and transportation of
respiratory gases
Neural and chemical regulators - ANSWER control the rate and depth of respiration in
response to changes tissue oxygen demands
Right ventricle - ANSWER pumps deoxygenated blood through pulmonary circulation
Left ventricle - ANSWER pumps oxygenated blood through systemic circulation
Myocardial pump - ANSWER 2 atria and ventricles
Starling's Law - ANSWER - a healthy heart stretches in proportion to the strength of
contraction.
- as myocardium stretches, contraction increases
Myocardial Blood Flow - ANSWER - unidirectional
- 4 valves ensure forward blood flow
Which valves open during ventricular diastole? - ANSWER - Atrioventricular (mitral and
tricuspid)
- S1 is louder
Which valves open during systole? - ANSWER - Semilunar (aortic and pulmonic)
,- S2
Coronary artery circulation - ANSWER coronary artery supplies the myocardium with
nutrients and removes waste
Systemic circulation - ANSWER arteries and veins deliver nutrients and oxygen and
remove waste products
Cardiac Output - ANSWER - amount of blood ejected from left ventricle each minute
- SV x HR
Stroke Volume - ANSWER amount of blood ejected from the left ventricle with each
contraction
Preload - ANSWER end diastolic volume
Afterload - ANSWER - resistance to left ventricular ejection
- diastolic aortic pressure is a good measure
Conduction system - ANSWER originates with SA node --> AV node --> bundle of HIS -->
bundle branches
Autonomic Nervous System - ANSWER influences rate of impulse generation and speed
of conduction pathways
Systemic Nervous System - ANSWER increases the rate of impulse generation and
transmission and innervates all parts of atria and ventricles
, Parasympathetic System - ANSWER decreases rate and innervates atrial, ventricles, SA
node, and AV node
P wave - ANSWER electric activity from SA node through both atria
QRS complex - ANSWER - electrical impulses traveled through the ventricles
- increase in duration indicates a delay in conduction time
QT interval - ANSWER time needed for ventricle depolarization and repolarization
Normal Sinus Rhythm - ANSWER - 60-100 beats per minute
- each beat has a P wave
Sinus Tachycardia - ANSWER - >100 beats per minute
- each beat has a P wave
Sinus Bradycardia - ANSWER - <60 beats per minute
- each beat has a P wave
- not always concerning
Respiration - ANSWER exchange of oxygen and carbon dioxide during cellular
metabolism
Ventilation - ANSWER moving gas in and out of lungs
Inspiration - ANSWER active process stimulated by chemical receptors in the aorta
