Download Chapter 19 Part B

Chapter 19 Part B: Blood Vessels
1. When your carotid sinus baroreceptors do not respond fast to sudden changes in body
positions when you rise from sitting or lying down. You blood pressure is temporarily
low and you get dizzy. What is the homeostatic imbalance called?
2. What are the differences between primary and secondary hypertension? Which is more
common?
3. Auto-regulation adjusts blood flow by changing the diameter of arterioles. This involves
both metabolic controls (chemicals present) and myogenic controls (stretch of vessels).
What are the differences between the actions of INTRINSIC (autoregulation) and
EXTRINSIC mechanisms of blood control?
4. What are the causes of circulatory shock? Define Hypovolemic shock, Vascular shock,
and Cardiogenic shock.
Chapter 22 Part A: The Respiratory System
1. Why do passageways to the alveoli decrease in size the closer the get? Why do alveoli
have such thin membranes?
2. What important property is given to alveoli elastic fibers? What prevents the alveoli from
collapsing?
3. What are atmospheric pressure, intrapulmonary pressure, and intrapleural pressure? Why
must intrapleural pressure be less than atmospheric pressure?
4. What is the medical term for the collapse of the lungs? What causes it?
5. Explain how Boyle’s Law applies to breathing (expiration/ inspiration). What muscle is
involved?