Quiz 2

Question 1

Local control of flow by resistance vessels requires

Answer 1

constant perfusion pressure (MAP)

Question 2

What are 3 keysites of MAP regulation

Answer 2

heart
resistance vessels
blood volume

Question 3

What are the two ways that the heart is regulated intrinsically?
–which one is more significant

Answer 3

1. preload–starling’s law
2. homeometric–treppe
   - -starlings

Question 4

sympathetic stimulation (increase/decrease) heart rate and (Increase/decrease) contractility and thus (Increase/decrease) stroke volume and output

Answer 4

increase

Question 5

Parasympathetic (increase/decrease) HR and CO

Answer 5

decrease

Question 6

atropine blocks para/sympathetic?

Answer 6

parasympathetic

Question 7

propanolol block para/sympathetic

Answer 7

sympathetic

Question 8

muscarinic is receptor for

Answer 8

acetylcholine

Question 9

b adrenergic is receptor for

Answer 9

norepinephrine

Question 10

adrenal medulla releases

Answer 10

epi and norepi

Question 11

adrenal medulla is part of sympathetic/parasymp

Answer 11

symp

Question 12

norepi and epi do what to heart rate and contractility

Answer 12

increase

Question 13

Why do athletes have slower heart rate

Answer 13

increased vagal tone and slower intrinsic SA firing rate

Question 14

t/f adrenal cortex is under control of the sympathetic nervous system

Answer 14

f

Question 15

adrenal cortex releases what 2 things

Answer 15

corticosteroids and aldosterone

Question 16

thyroid hormone does what to heart rate and contractility

Answer 16

increase

Question 17

What is proportionality of resistance to radius

Answer 17

R~ 1/r^4

Question 18

What are 3 ways that resistance is intrinsically controlled?

Answer 18

1. Basal tone/tension
2. Myogenic response/ Bayliss
3. local metabolites

Question 19

increased/decreased adenosine leads to vasodilation

Answer 19

increased

Question 20

increased/decreased PO2 leads to vasodilation

Answer 20

decreased

Question 21

increased/decreased pH leads to vasodilation

Answer 21

decreased

Question 22

increased/decreased CO2 leads to vasodilation

Answer 22

increased

Question 23

increased/decreased K+ leads to vasodilation

Answer 23

increased

Question 24

autoregulation is a combo of what two things

Answer 24

vasodilators/ myogenic response

Question 25

washout of vasodilators causes contraction/dilation

Answer 25

contraction

Question 26

sympathetic innervation and alpha adrenergic receptors that cause ________ are on VSM are present where?

Answer 26

all vascular beds except placenta

Question 27

does the parasympathetic innervation play a large role in regulation of MAP

Answer 27

no

Question 28

parasympathetic vasoconstriction/vasodilation

Answer 28

vasodilation

Question 29

does sympathetic play a large role in MAP reg

Answer 29

yes

Question 30

sympathetic vasoconstriction/vasodilation

Answer 30

vasoconstriction

Question 31

There is a resting sympathetic/parasympathetic tone?

Answer 31

sympathetic tone

Question 32

What contributes to basal tone of VSM?

Answer 32

myogenic and sympathetic

Question 33

withdrawal of sympathetic tone results in what two things

Answer 33

vasodilation and decreased TPR

Question 34

norepi constrict/dilate

Answer 34

constrict

Question 35

epi dilate/constrict

Answer 35

low doses dilate

Question 36

Vasopressin dilate/constrict

Answer 36

vasoconstrict

Question 37

Angiotensin II dilate/constrict

Answer 37

vasoconstrict

Question 38

Histamine dilate/constrict

Answer 38

vasodilate

Question 39

Bradykinin dilate/constrict

Answer 39

vasodilate

Question 40

prostaglandin is an endothelial mediator dilate/constrict

Answer 40

DILATE

Question 41

EDRF (endothelial derived relaxing factor) dilate/constrict

Answer 41

dilate/constrict

Question 42

endothelin is an endothelial mediator dilate/constrict

Answer 42

constrict