Week 4 Flashcards
The atrioventricular valves permit blood flow….
In 1 direction
Foramen ovale in the fetal heart is located in the…
Septum
A fine tubular wire mesh called a ______ may be inserted in to a coronary vessel, holding it open
Stent
An MI that affects the _______ side of the heart is more severe because it has to pump blood with ______ force
Left
More
Faster than normal heart rate
Tachycardia
Slower than normal heart rate
Bradycardia
Abnormal heart sound caused by turbulent flow through faulty valves are called…
Murmers
If there is a complete block between the SA node and the AV node, how would the ECG be affected?
Ventricles is ill stop beating
The structures responsible for distributing excitation to the contractile cells are
Conducting cells
The heart spends most of the cardiac
Cycle in which phase?
Ventricular diastole
Blood flow to a tissue will increase if the
Artterioles dilate
The median cubital vein is located at the…
Anterior surface of the elbow
Exchange between a blood vessel and the cells that surround it can occur only in….
Capillaries
With each ventricular systole:
- blood pressure remains steady.
- the ventricles fill with blood.
- blood pressure decreases.
- cardiac output decreases.
- blood pressure increases.
blood pressure increases
The amount of blood remaining in the ventricle when the semilunar valve closes is the:
- ejection fraction.
- end-diastole volume.
- start-diastolic volume.
- end-systolic volume.
- stroke volume
end-systolic volume
Which of the following describes what is directly measured by an ECG?
- the force of contractions
- blood vessel resistance
- end-systolic volume
- electrical conduction
- -neural stimulation of cardiac myocytes
electrical conduction
________ is when the heart can’t maintain adequate cardiac output.
- Heart failure
- Fibrillation
- Flutter
- Murmur
- Coronary heart disease
heart failure
An ECG is used to diagnose all of the following conditions except:
- an AV block.
- an ectopic pacemaker.
- angina pectoris.
- premature atrial contractions.
- ventricular tachycardia.
angina pectoris
The ________ is the difference between the resting and maximal cardiac output.
- end-systolic volume
- end-diastolic volume
- cardiac reserve
- stroke volume
- ejection fraction
cardiac reserve
Calculate the cardiac output of a patient with a heart rate of 100 beats/minute and a stroke volume of 75 ml.
- 0.75 ml / min
- 750 ml / min
- 7500 ml / min
- 175 ml / min
- 25 ml / min
7500ml/min
Considering the left ventricle, why does isovolumetric ventricular contraction occur during ventricular systole?
- The ventricle needs to pressurize the blood to close the aortic valve.
- Ventricular pressure is greater than atrial pressure so the ventricle cannot eject blood.
- The bicuspid valve needs time to shut before the ventricle can eject blood.
- Aortic pressure is higher than ventricular pressure and the ventricle must pressurize the blood to open the aortic valve.
- The ventricle is still filling with blood and therefore cannot eject blood during this time.
aortic pressure is higher than ventricular pressure and the ventricle must pressurise the blood toopen the aortic valve.
Which of the following is true of arteries compared to other vessels?
- Blood pressure and velocity are lowest.
- Blood pressure and velocity are highest.
- Blood pressure and cross-sectional area are lowest.
- Blood pressure and cross-sectional area are highest
- Velocity and cross-sectional area are highest.
blood pressure and velocity are highest
he condition known as ________ is characterized by the formation of fatty plaques within the wall of arteries.
- arthritis
- arteriosclerosis
- stenosis
- atherosclerosis
- multiple sclerosis
atherosclerosis
In which of the following would the blood flow be highest?
- a vessel 0.5 cm in diameter and 2 meters long
- a vessel 1.0 cm in diameter and 10 meters long
- a vessel 0.5 cm in diameter and 4 meters long
- a vessel 1.0 cm in diameter and 2 meters long
a vessel 1.0cm in diameter and 2 meters long