Problem
1) Circulation
• A person has a total blood volume of 5 L. Of this total, assume that 4 L is contained in the systemic circulation and 1 L is in the pulmonary circulation. If the person has a cardiac output of 5 L/min, how long will it take (i) for a drop of blood leaving the left ventricle to return to the left ventricle and (iib) for a drop of blood to go from the right ventricle to the left ventricle?
• Describe the process of an action potential in the pacemaker cells of the heart.
2) CNS
• Briefly compare the evolution of the vertebrate CNS and the development of the human brain.
3) Digest
• Explain how H2 receptor antagonists and proton pump inhibitors decrease gastric acid secretion.