Lecture 5.1: BP and hypertension

Question 1

Where can baroreceptors be found?

Answer 1

Carotid sinus and aortic arch.

Question 2

Where is the brainstem cardiovascular control centre found?

Answer 2

Medulla, there are pressor and depressor functions there. Operates via autonomic nervous system -> SNS/PNS

Question 3

How often does the BP resets in a day?

Answer 3

Once or twice a day.

Question 4

At what BP does chemoreceptors then kick in? What do they respond to?

Answer 4

Low O2, below 60mmHg.

Question 5

True or false? Women and men have the same mean BP.

Answer 5

False. Men have higher, 94mmHg compared to 89mmHg.

Question 6

What happens past 60 years of age?

Answer 6

Arteries fibrose, therefore compliance drops. Diastolic pressure drops but systolic continues to rise. So Pulse pressure increases.

Question 7

True or false? Females have a higher blood pressure than males at 10 years?

Answer 7

True, they go through puberty faster.

Question 8

True or false? Mass is proportional to BP

Answer 8

True.

Question 9

List the BP differences diurnally and seasonally.

Answer 9

20mmHg lower at night as less sympathetic innervation. 3mmHg higher in summer.