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Many cardio conditions > BP control > Flashcards

Flashcards in BP control Deck (24):
1

What mediates short term BP control

Baroreceptors

2

Where is the CV control centre in the brain

Medulla oblongata

3

What stimulates the afferent nerves in baroreceptors

Stretch of the vessels

4

Locations of baroreceptors

Aortic arch and carotid sinus

5

What do aortic arch baroreceptors respond to and what nerves send the signal to CV control centre

Increase in BP only and the vagus nerve

6

What do the carotid sinus baroreceptors respond to and what nerve sends the signal to the CV control centre

Increas and decrease in blood pressure and glossopharyngeal

7

What happens to baroreceptors firing in increased BP

Increases

8

Are baroreceptors an example of positive or negative feedback?

Negative feedback

9

Three long term BP control methods

RAAS, ADH and ANP

10

Where is renin released

Kidneys

11

Where is angiotensinogen released

Liver

12

What is produced when renin+angiotensinogen

Angiotensin 1

13

What is produced from angiotensin 1 and ACE

Angiotensin 2

14

What does angiotensin 2 do to blood vessels

Vasocontriction

15

What does angiotensin 2 also do

Aldosterone

16

What does aldosteron do

Salt and fluid retention leading to increased BP

17

Where is ADH synthesized

Hypothalamus

18

Where is ADH released

Posterior pituitry gland

19

What is ADH secretion stimulated by

Hypovoloemia and increased fluid osmolarity

20

What is the effect of ADH

Increased water re absorption in kidney tubules

21

What does ANP counteract

RAAS

22

How does ANP counteract RAAS

Decreases release of renin

23

What does ANP cause

Vasodilation (decreased BP)

24

Describe pressure natueresis

Increased sodium and water excretion in response to high BP