A & P- The Heart

The bicuspid valve __________________.

• is located on the left side of the heart
• guards the auricles of the heart
• guards the entrance to the aorta
• guards the entrance to the pulmonary trunk

The _____________ has the thickest wall because it pumps blood to the ________________.

• right atrium; systemic circuit
• right ventricle; lungs
• left atrium; lungs
• left ventricle; systemic circuit

Freshly oxygenated blood enters the heart through the ______________, and is pumped out the _____________.

• right atrium; aorta
• left atrium; aorta
• right ventricle; pulmonary arteries
• left ventricle; pulmonary arteries

When do the A-V valves close during the cardiac cycle?

• when pressure inside the ventricles is at its lowest
• when pressure inside the atria is greater than that inside the ventricles
• when ventricular pressure exceeds that of the atria
• when pressure is greater in the aorta than in the left ventricle

The inability of the left ventricle to pump blood adequately to the body's cells is indicative of ________________.

• an embolus
• cardiac tamponade
• congestive heart failure
• asystole

The _____ valve lies between the right atrium and right ventricle.

• bicuspid
• aortic semilunar
• pulmonary semilunar
• tricuspid

The exchange of gases and nutrients between blood and tissues is a major function of: 

• arterioles
• arteries
• capillaries
• veins

Which of the following statements best describes arteries? 

• all arteries carry oxygenated blood towards the heart 
•  all arteries contain valves to prevent the back-flow of blood 
• all arteries carry blood away from the heart  
• only large arteries are lined with endothelium

Blood returning to the heart from the inferior vena cava would enter the: 

• left atrium
• right atrium
• left ventricle
• right ventricle

Blood in the pulmonary arteries: 

• enters the heart’s right ventricle 
• is heading towards the lungs  
• leaves the left ventricle to enter the aorta 
• flows from the lungs towards the heart’s left atrium