Essentials HC- 10

 What is the purpose of the valves in the heart? 

• To control how fast the heart beats 
• To prevent pathogens from entering the heart 
• To separate the heart into two sides 
• To keep the blood flowing in only one direction 

 In what type of circulation does the blood flow between the heart and lungs?  

• Pulmonary
• Systemic
• Atrioventicular
• Metabolic

Which of these items fights disease and infection? 

• Marrow
• Red blood cells
• Platelets
• White blood cells

How many chambers are in the heart? 

• One
• Two
• Three
• Four

Which of these items help form clots? 

• Marrow
• Platelets
• White blood cells
• Red blood cells

Which layer of the heart contains a lubricating fluid that reduces friction as the heart beats? 

• Pericardium
• Endocardium
• Myocardium
• None of these

 Iron or vitamin B12 supplements may be a treatment for which of these diseases? A. Hypertension B. Anemia C. Leukemia D. All of the above 

• Hypertension
• Anemia
• Leukemia
• All of these

What is the pale yellow liquid part of the blood? A. Rh factor B. Plasma C. Formed elements D. Antibodies 

• Rh factor
• Plasma
• Formed elements
• Antibodies

Which of these types of blood vessels carry blood back to the heart? A. Artery B. Vein C. Capillary D. All of the above 

• Artery
• Vein
• Capillary
• All of these

Why does Sickle Cell Disease cause pain? 

• The sickle cells stack up in the blood vessels. 
• The sickle cells cause anemia. 
• The disease causes an excess of red blood cells in the organs.
• The disease causes an excess of white blood cells to accumulate in the organs.