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WorksheetsCardiovascular 2: Physiology
Total questions: 12
Worksheet time: 6mins
The nodal system is
the controlling system for voluntary cardiac muscle constriction.
The unifying control system for the heart beats
The control system for vasodilation of blood vessels
This is located in the right atrium and is the heart's pacemaker.
Sinoatrial (SA) node
Atrioventricular (AV) node
Atrioventricular (AV) bundle
Purkinje fibers
________ spread the impulse through the ventricle wall muscles of the heart after the signal is sent through the AV bundle.
Sinoatrial (SA) node
Atrioventricular (AV) node
Purkinje fibers
Rapid heart rate (over 100 bpm)
Tachycardia
Bradycardia
Slow heart rate (under 60 bpm)
Tachycardia
Bradycardia
Systole = __________
Diastole = ___________
contraction;
relaxation
relaxation;
contraction
Which order of events is correct for the cardiac cycle?
1. Atrial systole
2. Atrial diastole (filling)
3. Isovolumetric relaxation
4. Ventricular Systole (ejection)
5. Isovolumetric contraction
1. Atrial diastole (filling)
2. Atrial systole
3. Isovolumetric relaxation
4. Ventricular Systole (ejection)
5. Isovolumetric contraction
1. Atrial diastole (filling)
2. Atrial systole
3. Isovolumetric contraction
4. Ventricular Systole (ejection)
5. Isovolumetric relaxation
About ___ mL of blood is pumped out of the left ventricle with each heart beat.
(hint: it is 60% of the body's blood)
50
60
70
80
Cardiac Output (CO) formula.
**HR= heart rate & SV= Stroke Volume**
SV = CO x HR
CO = HR / SV
CO = SV / HR
CO = HR x SV
Factor that modifies heart rate: Sympathetic nervous system speeds up HR & parasympathetic nervous system slows HR
Neural (ANS) controls
Hormones and ions
Physical Factors
Factor that modifies heart rate: Epinephrine and thyroxine speed the HR.
(Excess/lack of Ca, Na, and K ions also modify heart activity)
Neural (ANS) controls
Hormones and ions
Physical Factors
Which of these physical factors impacts the heart rate?
Age
Body Temperature
Gender
Exercise
