HILL Neuro control of vascular tone Flashcards Preview

Cardio unit 5 > HILL Neuro control of vascular tone > Flashcards

Flashcards in HILL Neuro control of vascular tone Deck (24)
Loading flashcards...
1

what is the function of arteries and what is the only exception

Deliver oxygenated blood to the organs (always oxygenated
except in the case of the Pulmonary Artery)

2

What do the walls look like in arteries

• Have thick muscular walls (receive blood directly from the
heart and are under the highest pressure in the vasculature)

3

which vessels have the highest pressure in the vasculature

arteries

4

stressed volume refers to

arteries

5

what are the smalles branches of arteries called

arterioles

6

what vessels have the highest resistance in the vasculature to blood flow

arterioles

7

Where is the site where resistance to blood flow can be changed by
sympathetic nerve activity, catecholamines

arterioles

8

where is the site of f nutrient and gas exchange

capillaries

9

what are the walls of capillaries like

thin walled

10

what do veins carry and what is the one exception

Carry de-oxygenated blood (always de-oxygenated except in
the case of the Pulmonary Vein)

11

is the blood in veins under high or low pressure

low

12

unstressed volume refers to what

veins

13

why is vascular tone important

regulates mean arteriol pressure

14

how is mean arteriol pressure calculated

MAP = diastolic pressure + 1/3 pulse pressure

15

how is arterial pressure calculated

cardiac output x TPR

16

What is the avg arterial Pressure

100 mmHg

17

What is THE SINGLE MOST IMPORTANT
REQUIREMENT FOR PROPER OPERATION OF THE
CARDIOVASCULAR SYSTEM!

FINE-TUNED REGULATION OF SYSTEMIC ARTERIAL
PRESSURE IS THE SINGLE MOST IMPORTANT
REQUIREMENT FOR PROPER OPERATION OF THE
CARDIOVASCULAR SYSTEM!

18

what mediates the barorepceptor reflex

neurally mediated

19

what kind of receptors are baroreceptors

Baroreceptors are mechanoreceptors

20

where are the 2 places that we can find baroreceptors

• Located in the carotid sinus and aortic arch

21

what can the carotid sinus baroreceoptors sense

Carotid sinus baroreceptors are responsive to
increases or decreases in arterial pressure

22

What do aoritic arch baroreceptors sense

Aortic arch baroreceptors primarily responsive
to increases in arterial pressure

23

where do information from baroreceptors go

they go to the cardiovascualr centers of the brain (medulla and pons)

24

what is the function of the nucleus tractus solitatirus

Receive information about blood pressure from the baroreceptors and then direct changes in output of the sympathetic and parasympathetic
nervous systems to correct blood pressure