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Physiology 3 Exam 2 > Part 6 > Flashcards

Flashcards in Part 6 Deck (62)
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1

At birth, there is increased blood flow through the?

Lungs and Liver

2

At birth, pulmonary vascular resistance?

Decreases

3

At birth there is loss of blood flow through the?

Placenta

4

Loss of blood flow through the placenta doubles the?

Systemic Vascular Resistance

5

At birth, there is closure of?

Foramen Ovale
Ductus Arteriosis
Ductus Venosus

6

Closure of foramen ovale is due to reversal of pressure gradient between?

R and L atrium

7

Reversal of flow from aorta to pulmonary artery, and increased oxygen levels cause constriction of smooth muscle causes closure of?

Ductus Arteriosis

8

It's unknown why ductus venosus closes, but it allows portal blood to?

Perfuse Liver Sinuses

9

In fetal circulation, the R and L ventricle pump in parallel into the?

Aorta

10

In fetal circulation there is very little?

Pulmonary Blood Flow

11

In fetal circulation there is low pressure in the aorta due to low TPR because of?

Placenta-Umbillical Arteries

12

In fetal circulation, blood returning from the placenta via the umbilical veins bypass liver and flow directly into?

IVC via Ductus Venosus

13

In a fetus there exists 2 right to left shunts for blood to bypass?

Lungs

14

Foramen ovale shunts most blood returning to the heart from the?

IVC to the L atrium

15

Ductus Arteriosis shunts most blood returning to the heart from the?

SVC to the Aorta

16

What's the greatest stress on the cardiovascular system?

Exercise

17

Sympathetic nervous system orchestrates many of the changes associated with?

Exercise

18

With exercise what in increase 5-6 fold?

Cardiac Output

19

During exercise, blood flow is shifted primarily from organs to?

Active skeletal muscle

20

During exercise there is cerebral cortical activation of the?

Sympathetic Nervous System

21

The SNS will cause vasoconstriction of arterioles to decrease?

Flow to non active tissues (viscera)

22

The SNS will cause vasoconstriction of veins to increase MCFP which increases?

Venous Return

23

The SNS will stimulate the heart by increasing HR and SV which ultimately increases?

Cardiac Output

24

During exercise TPR decreases due to?

Vasodilation in active muscle

25

During exercise increase O2 uptake decreases VO2 which increases?

AVO2 Difference

26

SNS stimulation is due to?

Cerebral Cortex Stimulation

27

Reflex signals from active joint proprioceptors and muscles as well as local chemoreceptor signals originating in the active muscle will stimulate?

SNS

28

SNS will induce local metabolic vasodilation at the?

Heart

29

SNS stimulation of pre-capillary resistance vessels decreases?

Blood Flow

30

SNS stimulation of veins causes constriction which mobilizes blood out of veins and increases?

Venous Return