14: Regulation Of BP And Endocrinology

Question 1

How is aortic sinus different from carotid sinus?

Answer 1

Aortic: higher threshold for activation + continues to respond above saturation + less sensitive to rate

Question 2

What does RAAS stand for?

Answer 2

Renin-angiotensin-aldosterone system

Question 3

How long does RAAS last?

Answer 3

Begins in minutes and builds over a period of days/longer

Question 4

Three named natriuretic peptides

Answer 4

1. ANP: atrial
2. BNP: brain
3. CNP: C-type

Question 5

Orthostatic hypotension

Answer 5

Lying supine and rising to standing position -> lightheaded and dizzy, can cause syncope

Question 6

Mechanism of orthostatic hypotension?

Answer 6

Standing -> pooling of blood in veins -> slight decrease to baroreceptors -> increased symp outflow -> increases HR, CO, and TPR

Question 7

Two causes of HTN and the percents

Answer 7

1. 90-95%: idiopathic

2. 5-10%: secondary (from kidneys, endocrine, or CV)

Question 8

Two types of idiopathic HTN and give examples

Answer 8

1. Unmodifiable: increasing age, FHx

2. Modifiable: obesity, physical inactivity, elevated salt consumption

Question 9

Recommended no more than how much sodium in a day?

Answer 9

2,300mg