Cardiac Cycle & Intrinsic Beat

Question 1

SA node stands for…

Answer 1

Sinoatrial node

Question 2

SA node is found…

Answer 2

In the upper wall of the right atrium

Question 3

SA node is also called…..

Answer 3

The pacemaker

Question 4

0.30sec

Answer 4

Atria: diastole Ventricles:Systole

Question 5

Diastole

Answer 5

Relaxation of the heart

Question 6

The letters ____________ Are the standard labels used to identify the parts of the EKG

Answer 6

PQRST

Question 7

0.85sec

Answer 7

Average time of 70 bpm

Question 8

The heart will beat without any….

Answer 8

Nervous system stimulation, and can be removed from the body and still continue beating

Question 9

0.40 secs

Answer 9

Atria: Diastole Ventricles:Diastole

Question 10

AV node is found…

Answer 10

At the bottom of the right atrium near the septum

Question 11

What are the two locations of nodal tissue in the heart?

Answer 11

SA node and AV node

Question 12

AV node stands for….

Answer 12

Atrioventricular node

Question 13

0.15sec

Answer 13

Atria: systole Ventricles: Diastole

Question 14

What controls the heart beating?

Answer 14

A special type of tissue called the nodal tissue

Question 15

What has a stronger and longer contraction?

Answer 15

Ventricles

Question 16

The SA node sends out an ________________ every ______ seconds

Answer 16

Initiatesexcitation impulse , 0.85

Question 17

Each heartbeat (cardiac cycle) consists of:

Answer 17

Time: Atria: Ventricle:

0. 15sec. Systole Diastole
1. 30sec. Diastole Systole
2. 40sec. Diastole Diastole

0.85sec Average time of 70 bpm

Question 18

The QRS….

Answer 18

Is the contraction of the ventricles as they drive the blood out into their respective arteries

Question 19

The T….

Answer 19

Marks the recovery of the ventricles(restoration of the normal electrical conditions, preparing them for the next contraction)

Question 20

The initiatiatesexcitation impulse sent by the SA node, causes both _________ to contract.

Answer 20

Atria

Question 21

Why does ventricles have a stronger and longer contraction?

Answer 21

Because blood must be pumped throughout the body

Question 22

The beat of the heart is

Answer 22

Intrinsic

Question 23

What is the order of the closing of the valves (lub-dubb)?

Answer 23

First the atrioventricular, than the semi lunar

Question 24

The impulses sent from the AV node down the purkinje fibres cause what contraction?

Answer 24

Causing both ventricles to contract

Question 25

The nodal Tissue has both….

Answer 25

Muscular and nervous tissue characteristics

Question 26

luv-dubb is due to…

Answer 26

The closing of valves

Question 27

Systole

Answer 27

Contractions of the heart

Question 28

Contractions of the heart is a ________ Step process

Answer 28

Two

Question 29

What registers the voltage changes across the surface of the heart as it beats?

Answer 29

And electrocardiogram

Question 30

When the impulse reaches the AV node an impulse is sent from ______________ , down ________________

Answer 30

From AV node, down the Purkinje fibres

Question 31

The P curve….

Answer 31

Records the simultaneous contraction of the atria as they drive the blood out into their ventricles

Question 32

Lub-dubb

Answer 32

Sound of the heart

Question 33

The initiatesexcitation impulse( SA) is sent to______________ via _______________.

Answer 33

The AV node, via the bundle of His