Heart/Lung/Liver/Hormones Flashcards Preview

Physiology Part I > Heart/Lung/Liver/Hormones > Flashcards

Flashcards in Heart/Lung/Liver/Hormones Deck (32)
Loading flashcards...
1

Blood into the heart:
A. Blood from Upper extremity flows into what?
B. Blood from lower extremity flows into what?
C. What is the exception?

A. SVC
B. IVC
C. Azygous vein drains lumbar into SVC

2

Right Atrium:
A. 80% of blood passively flows into where?
B. What % is required for atrial contraction?
C. What EKG wave reps atrial contraction?

A. R. Ventricle
B. 20%
C. P-wave

3

R. Atrium:
Atrial contraction (p-wave) starts at the _a_ node in the _b_ of the _c_ atrium.

a. SA
b. Crista Terminalis
C. Right

4

The right atrial impulse travels to what node?

AV

5

AV node delay:
What node impulse to AV node? What is delayed?

SA node, P-R interval is delayed

6

The type of membrane potential that is all or none and is propagated.

Action potential

7

A local potential will only cause an action potential to occur if

Threshold is reached

8

What type of neurons transmit impulses to intrafusal muscles?

Gamma motor

9

The first order neuron from the hand in the dorsal column medial lemniscal system terminates where?

Ipsilateral fasciculus cuneatus

10

The depolarization phase of the action potential is caused by

Influx of sodium ions

11

The simultaneous firing of presynaptic neurons onto a single post-synaptic neuron has an additive effect on that neuron is called

Spatial summation

12

High frequency vibrations are best received by what type of receptor?

Pacinian corpuscles

13

Simultaneous firing of several pre-synaptic neurons cause the post-synaptic cell to reach threshold. This is an example of

Spatial summation

14

Which neurotransmitter is believed to always be inhibitory?

GABA

15

Action potentials occur only at the ___ in myelinated neurons.

Nodes of Ranvier

16

Skin stretch is best received by what type of receptor?

Ruffini endings

17

Depolarization phase of action potential is caused by

Influx of Na ions

18

The ___ is associated with a high degree of spatial localization and fine gradation of intensity of touch.

Dorsal column medial lemniscus

19

The first order neuron from the hand in the dorsal column medial lemniscal system terminates where?

Ipsilateral fasciculus cuneatus

20

What ion triggers the release of neurotransmitters from the pre-synaptic neurons is

Calcium

21

A. The end of diasystole 120 ml is when what occurs?
B. What heart sound is made at the end of diasystole?

A. Tricuspid valve closes
B. S-1

22

Ventricular depolarization occurs where on an EKG?

QRS complex (ventricle contracts)

23

Mid-systole (halfway through) has enough pressure to do what?

Blow open pulmonic semi-lunar valves

24

Blood exits via 2 pulmonary ___ to the lungs.

Arteries

25

Pulmonary artery carries oxygenated or deoxygenated blood?

DeOxygenated blood
Also carriers umbilical artery in fetus

26

Blood is oxygenated via __ effect in the lungs.

Bohr effect

27

What is the ratio of O2 to hemoglobin?

4:1

28

What % is hemoglobin saturated by oxygen?

97%

29

Blood exits the lungs via 4 pulmonary __ into the __ atrium.

Veins
Left

30

Highest oxygen concentration is in what system?

Cardiac

31

The pulmonary veins carry __ blood and what in the fetus?

Oxygenated
Umbilical vein

32

80% of blood passively flows into where?
The remaining 20% needs what?

Left ventricle
P-wave AV nodal delay