SBL Week 3 - Learning Issues

Question 1

What are the different grades of hypertension? What are the ranges?

Answer 1

There are three grades of hypertension. The higher the grade, the worse the hypertension. The grades are as follows:

Grade 1: 140-159/90-99

Grade 2: 160-179/100-109

Grade 3: 180+/110+

Question 2

How do you diagnose high blood pressure (how many readings)?

Answer 2

Two or more readings.

Question 3

What are the factors that contribute to blood pressure?

Answer 3

Resistance and flow (think: Ohms law)

Question 4

What is the normal range of MAP?

Answer 4

70-100mmHg

Question 5

How do you measure stroke volume?

Answer 5

Using ECG ventricle measurements, subtract the volume of the ventricle at the end of the beat from the volume at the start.

Question 6

What is the role of endothelial cells in blood vessels (including secretory function)?

Answer 6

Endothelial cells regulate communication between the bloodstream and the surrounding tissue.

They also secrete:
- Vasoconstriction/vasodilation factors
- Enzymes that regulate anticoagulant (prevent fibrin format) and anti-platelet (prevents aggregation)

Question 7

Blood supply for vessels themselves – vasa vasorum?

Answer 7

In larger vessels, the vasa vasorum penetrates the tunica adventitia and tunica media.

In smaller vessels, it penetrates only the tunica adventitia.