Question

question 7
the pulmonary semilunar valve prevents backflow of blood from the pulmonary artery to the right ventricle.
true
false

question 8
exchanges between blood and tissue cells occur in capillary beds.
true
false

question 9
the tricuspid valve prevents backflow of blood from the left ventricle to the right atrium.
true
false

Explanation:

• For Question 7: The pulmonary semilunar valve is positioned between the right ventricle and the pulmonary artery and its function is to prevent back - flow of blood from the pulmonary artery to the right ventricle.
• For Question 8: Capillary beds are the sites where exchanges of oxygen, nutrients, and waste products between blood and tissue cells occur.
• For Question 9: The tricuspid valve is between the right atrium and right ventricle, not between the left ventricle and right atrium.

Answer:

Question 7: A. True
Question 8: A. True
Question 9: B. False