HSI YMCA BLS ACTUAL QUESTIONS AND
CORRECT ANSWERS COMPLETE LIFE
SUPPORT STUDY GUIDE
●● sliding filament theory
Answer: muscle shortens or lengthens when filaments (actin & myosin)
slide past one another
●● Fiber types
Answer: type I: slow oxidative, fatigue resistant
type IIa: fast oxidative glycolytic, some fatigue resistant
type IIx: purely anaerobic, highly fatigue
●● SA node
Answer: primary instrinsic pacemaker of heart
●● AV node
Answer: spreads impulse from SA node into Purkinje system (stimulates
ventricular contration)
●● Electrocardiogram
Answer: P-wave: SA node to AV node
,QRS complex: AV node to purkinge fibers
T-wave: repolarization of ventricles
●● Rate Pressure Product (RPP)
Answer: HR x SBP
how much O2 the heart needs
●● Mean Arterial Pressure (MAP)
Answer: DBP + [(1/3) + (SBP-DBP)]
●● Cardiac output
Answer: the amount of blood pumped by the heart per minute
Q= SV x HR
●● Stroke Volume (SV)
Answer: The amount of blood pumped out of the heart with each
contraction.
SV= EDV - ESV
●● End Diastolic Volume (EDV)
Answer: volume of blood in ventricles after filling
,●● End Systolic Volume (ESV)
Answer: Amount of blood remaining in each ventricle at the end of
systole (contraction).
●● frank-starling principle
Answer: the more the left ventricle is stretched, the more forceful the
contraction and thus the greater volume of blood leaving the ventricle
●● tidal volume
Answer: Amount of air that moves in and out of the lungs during a
normal breath
●● vital capacity
Answer: total amount of exchangeable air
●● total lung capacity
Answer: entrie gas volume of a max. inflated pulmonary system
●● Resiual Volume (RV)
Answer: amount of air left in lungs after max. exhale
●● Functional Residual Capacity (FRC)
Answer: amount of air left in lungs after normal exhale
, ●● Capillaries
Answer: site of gas exchange
●● Ventilation
Answer: oxygen diffuses from alveoli - pulmonary blood
CO2 diffuses from blood - alveoli
●● VO2
Answer: Q x a-vO2 difference (O2 extraction for exsc)
●● catabolic metabolism
Answer: Processes by which larger molecules are broken down into
smaller ones
●● anabolic metabolism
Answer: cellular process in which large molecules are built up from
smaller ones
●● phosphagen system
Answer: - Anaerobic
- Short- high-intensity exercise
- produces ATP very fast
CORRECT ANSWERS COMPLETE LIFE
SUPPORT STUDY GUIDE
●● sliding filament theory
Answer: muscle shortens or lengthens when filaments (actin & myosin)
slide past one another
●● Fiber types
Answer: type I: slow oxidative, fatigue resistant
type IIa: fast oxidative glycolytic, some fatigue resistant
type IIx: purely anaerobic, highly fatigue
●● SA node
Answer: primary instrinsic pacemaker of heart
●● AV node
Answer: spreads impulse from SA node into Purkinje system (stimulates
ventricular contration)
●● Electrocardiogram
Answer: P-wave: SA node to AV node
,QRS complex: AV node to purkinge fibers
T-wave: repolarization of ventricles
●● Rate Pressure Product (RPP)
Answer: HR x SBP
how much O2 the heart needs
●● Mean Arterial Pressure (MAP)
Answer: DBP + [(1/3) + (SBP-DBP)]
●● Cardiac output
Answer: the amount of blood pumped by the heart per minute
Q= SV x HR
●● Stroke Volume (SV)
Answer: The amount of blood pumped out of the heart with each
contraction.
SV= EDV - ESV
●● End Diastolic Volume (EDV)
Answer: volume of blood in ventricles after filling
,●● End Systolic Volume (ESV)
Answer: Amount of blood remaining in each ventricle at the end of
systole (contraction).
●● frank-starling principle
Answer: the more the left ventricle is stretched, the more forceful the
contraction and thus the greater volume of blood leaving the ventricle
●● tidal volume
Answer: Amount of air that moves in and out of the lungs during a
normal breath
●● vital capacity
Answer: total amount of exchangeable air
●● total lung capacity
Answer: entrie gas volume of a max. inflated pulmonary system
●● Resiual Volume (RV)
Answer: amount of air left in lungs after max. exhale
●● Functional Residual Capacity (FRC)
Answer: amount of air left in lungs after normal exhale
, ●● Capillaries
Answer: site of gas exchange
●● Ventilation
Answer: oxygen diffuses from alveoli - pulmonary blood
CO2 diffuses from blood - alveoli
●● VO2
Answer: Q x a-vO2 difference (O2 extraction for exsc)
●● catabolic metabolism
Answer: Processes by which larger molecules are broken down into
smaller ones
●● anabolic metabolism
Answer: cellular process in which large molecules are built up from
smaller ones
●● phosphagen system
Answer: - Anaerobic
- Short- high-intensity exercise
- produces ATP very fast
