Problem
I. True or False: The right atrium is the first to receive blood from the pulmonary veins.
II. Which antibody is responsible for long-term immunity?
i. IgA
ii. IgM
iii. IgG
iv. IgE
III. True or False: CD8+ cells help regulate antibody response.
IV. What takes over control of the heartbeat when the SA node fails?
V. Why does most gas exchange occur in the capillaries? What would happen if gas exchanged took place in the arteries instead?