Anatomy II Question Chapter 21 1 Why are large arteries able

Anatomy II Question Chapter 21:

1. Why are large arteries able to expand and recoil during systole and diastole?

2. Explain how an ACE inhibitor lowers blood pressure. (ACE is an enzyme required to form angiotensin II)

3. Determine the effect of each factor on capillary filtration/reabsorption: a. albumin deficiency, b. elevated capillary blood pressure, c. elevated protein in interstitial fluid

4. What effect does pulmonary edema have on blood oxygenation?

5. What is the consequence to the newborn if the foramen ovale does not close after birth?

Solution

1. Blood pressure of our body is dependent on heart contractions and elastic recoils of the arteries. The elastic recoil of the artery allows it to expand but then exert an inward force to create blood pressure. The artery slowly returns back to its shape by continuing maintaining its pressure. This is why blood pressure of normal adult fluctuates between 70 - 120 mm Hg.