Blood flow and electrical stuff of heart

Question 1

The pulminary circuit carries __ blood to the ___

Answer 1

Co2, Lungs

Question 2

What is the average resting heart rate?

Answer 2

~ 75 bpm

Question 3

What system sets the resting heart rate?

Answer 3

Intrinsic conduction or the nodal system

Question 4

Define pacemaker cells

Answer 4

Non contractile cardiac muscle cells that spontaneously depolorize

Question 5

Which cardiac muscle cells are responsible for contraction?

Answer 5

Contractile Cells

Question 6

What are the pacemaker cells?

Answer 6

Sinoatrial Node
Atrioventricular node
atrioventriuclar bundle
Right and Left bundle branches
Purkinje fibers

Question 7

What is the Lub sound when the heart beats caused by?

Answer 7

When atrioventricular valves close

Question 8

What is the Dub sound when the heart beats caused by?

Answer 8

When the semilunar valves close

Question 9

What causes an adult heart murmur

Answer 9

A defective heart valve

Question 10

What does the vagus nerve do in terms of contraction of the heart?

Answer 10

It decreases the rate of contraction

Question 11

The right vagus nerve affects which pacemaker cells?

Answer 11

Sinoatrial node

Question 12

The left vagus nerve affects which pacemaker cells?

Answer 12

Atrioventricular node

Question 13

Which nerve increases rate of contraction of the heart?

Answer 13

Spinal nerves T1-4

Question 14

What does an EKG do?

Answer 14

Records electrical events in the heart

Question 15

What does the P wave represent?

Answer 15

Represents the Sinoatrial node depolorizing and atria contraction

Question 16

What does the P-R interval represent?

Answer 16

The time it takes for the depolorization to reach the atrioventricular node
this is the delay period

Question 17

What does QRS interval represent?

Answer 17

Represents the contraction of the ventricles and atrial relaxation

Question 18

What does the T wave represent?

Answer 18

Relaxation of the ventricle

Question 19

Systole

Answer 19

Contraction

Question 20

Diastole

Answer 20

relaxation

Question 21

What is the general order of the heartbeat?

Answer 21

Atrial Contraction and Ventricular filling
Isovolumetric contraction
Ventricular ejection
Isovolumetric relaxation
Atrial Relaxation and ventricular filling

Question 22

What happens in Atrial Contraction and Ventricular Filling?

Answer 22

The “P” wave
Sinoatrial node depolorizes
Atria contract and Ventricles get filled w blood
AV valves open, SL closed
Atrial and Artery pressure is greater than Ventricular pressure

Question 23

What happens during isovolumetric contraction?