Fetal circulation Flashcards Preview

Dental Boards Review > Fetal circulation > Flashcards

Flashcards in Fetal circulation Deck (55)
Loading flashcards...
1

In fetal circulation, all blood is oxygenated or deoxygenated?

OXYGENATED

2

Pathway of fetal circulation.

Umbilical vein > Liver> Ductus venosus > Inferior vena cava > Right atrium > Foramen ovale > Left atrium > Left ventricle > AORTA


from Right atrium > right ventricle > pulmonary artery> ductus arteriosus > AORTA

3

What are the 3 shunts during fetal days?

Ductus venosus
Foramen ovale
Ductus arteriosus

4

Remnants of Umbilical vein

Ligamentum teres

5

Remnants of ductus venosus

Ligmaentum venosus

6

Remnants of Foramen Ovale

Fossa ovalis

7

Remnants of ductus arteriosus

Ligamentum arteriosus

8

Ligamentum teres is found in what organ?

Liver

9

Foramen ovale in the heart is found?

Interatria/ Between R. atrium and Left atrium

Specifically R. atrium

10

Connection of pulmonary artery to aorta

Ductus arteriosus

11

Flow of blood to ductus arteriosus

From umbilical vein to Inferior vena cava

12

Remnant of umbilical cord can be seen?

Navel

13

It is caused by the movement of IONS between the inside and outside of the membrane.

Electric impulse

14

Other term for electric impulse

Action potentials

15

2 basic ions for Action potential

Sodium and potassium

16

Depolarization due to increase Na+ and Decreased K+, is what phaseof action potential?

PHASE 0

17

What happens in Phase 1 of action potential?

Partial repolarization due to decreased Na+ ion.

18

Phase where in Ca+ ion Increases, prolonging the depolarization

Phase 2

19

Phase 3 in action potential

Repolarization, Na+ and Ca+ are all close (300mS)

20

Phase where in Resting membrane potential occurs due to exchange of Na+ - K+ pump

Phase 4

21

Strongest ion which creates the longest action potential

Calcium

22

Node located on the superior wall of RIGHT atrium.

Sino-atrial node (SA)

23

radiation present in SA node

electromagnetic radiation

24

Natural pacemaker of the heart

SA node

25

Function of SA node

For ATRIAL contraction

26

This reflex produces an increased heart rate due to stretching of the right atrium.

BAINBRIDGE REFLEX

27

Muscle in Right atrium that helps in muscle contraction.

Pectinate

28

Node located between ATRIA and VENTRICLES

Atrioventricular node (AV)

29

Function of AV node

For Ventricular contraction

30

Nodes located at the apex of the heart.

Bundle of HIS
Purkinje fibers