Cardiac Output

Which does not describe cardiac output?

• It is determined by body size and aerobic fitness

• The amount of blood pumped by the heart each minute

• It is the amount of blood pumped out of the heart each beat

• It is the product of heart rate and stroke volume

What is stroke volume?

• the volume of oxygen transported in the blood

• the volume of blood pumped out of the heart each minute

• the volume of blood pumped out of the heart in each beat

• the number of beats per minute

When Alex was sprinting yesterday, she had a heartbeat of 170 bpm and a stroke volume of 70 ml. Calculate her cardiac output.

• 10.9 liters per minute or 10,900ml per minute

• 13.9 liters per minute or 13,900ml per minute

• 11.9 liters per minute or 11,900ml per minute

• 9.9 liters per minute or 9,900ml per minute

Which of the following that could possibly increase the stroke volume? Tick all that apply.

• EDV

• Myosin and Actin Overlap

• Afterload

• Contractility

EDV is dependent on venous return of blood to the heart. The following are the factors that can increase the venous return to the heart, EXCEPT.

• Venoconstriction

• Skeletal muscle pump

• Cardiovascular pump

• Respiratory pump

What is the normal heart pressure (Systolic/Diastolic)

• 120/80

• 80/120

• 140/90

• 90/60

Which of these is/are true about systolic blood pressure?

• The left ventricle is relaxing

• The left ventricle is contracting

• The right ventricle isrelaxing

• All of the above

What is effect does epinephrine have on heart rate?

• It slows it down

• It speeds it up

• The same as acetylcholine

• All of the above

During exercise, an athlete will likely

• Decrease ejection fraction

• Release acetylcholine from parasympathetic nerves near the heart

• Increase EDV

• Decrease venous return

Contractility is a measure of

• Stroke Volume

• Heart Efficiency

• Heart Rate

• Cardiac output