A P II 2026 HUMAN ANATOMY AND
PHYSIOLOGY ASSESSMENT QUESTIONS
SOLUTIONS FINAL STUDY GUIDE
◉ Describe the oxygen pathway in the body.
Answer: Air → lungs → alveoli → blood → heart → arteries →
capillaries → cells → mitochondria → ATP.
◉ What are the three phases of a heartbeat?
Answer: Atria contract, ventricles contract (systole), heart relaxes
(diastole).
◉ How do heart valves operate?
Answer: Valves open and close based on pressure differences.
◉ What is the role of the SA node?
Answer: It acts as the natural pacemaker of the heart.
◉ What drives gas exchange in the lungs?
PHYSIOLOGY ASSESSMENT QUESTIONS
SOLUTIONS FINAL STUDY GUIDE
◉ Describe the oxygen pathway in the body.
Answer: Air → lungs → alveoli → blood → heart → arteries →
capillaries → cells → mitochondria → ATP.
◉ What are the three phases of a heartbeat?
Answer: Atria contract, ventricles contract (systole), heart relaxes
(diastole).
◉ How do heart valves operate?
Answer: Valves open and close based on pressure differences.
◉ What is the role of the SA node?
Answer: It acts as the natural pacemaker of the heart.
◉ What drives gas exchange in the lungs?