AP2 Heart Lecture Exam

¡Supera tus tareas y exámenes ahora con Quizwiz!

Where does the blood pass through? (LV)

Left ventricle through aortic valve into ascending aorta

The heart's electrical conduction network found within the ventricular myocardium is termed the:

Purkinje fibers

Shape

Thickness varies according to fix -Walls of left ventricle thicker than right ventricles

Pericardium

Thin sac enclosing the heart -membrane that surrounds heart -Support during contractions and positions

Interatrial Septum

bw rt and it, contains fossa ovalis from birth

The exchange of gases and nutrients between blood and tissues is a major function of:

capillaries

Immediately following strenuous and vigorous exercise, which of the following is most likely to occur?

capillaries of the active muscles will be engorged with blood

The second heart sound (the 'dup' of 'lub-dup') is caused by the __________.

closure of the semilunar valves

systole

contraction

Coronary Sulcus

encircles heart, atria and ventricles

The lining of the inner walls of the heart's chambers is termed the:

endocardium

The circulatory pathway that carries blood from the digestive tract towards the liver is termed the

hepatic portal circuit

Into which chamber of the heart do the pulmonary veins deliver blood?

left atrium

Freshly oxygenated blood is delivered to the __________ and then it passes into the __________ to be pumped to the entire body.

left atrium; left ventricle

The most muscular chamber of the heart is the __________.

left ventricle

The outermost layer of the heart's serous pericardium is termed the:

parietal pericardium

cardiac cycle

the events associated with blood flow through the heart during one complete heartbeat

If the heart's natural pacemaker fails to fire, then

the node on the floor of the right atrium would act as a secondary pacemaker

tricuspid valve

valve between the right atrium and right ventricle

Where does the blood pass through?

Left atrium into left ventricle through bicuspid (mitral) valve

Left Ventricle

-Apex -Trabeculae carnae and chordae tendinae -Some blood flows into the coronary arteries -Remainder passes into arch of the aorta and descending aorta -Branches of arch of the aorta carry blood throughout the body

Left Atrium

-Base of the heart -Smooth anterior and posterior walls

Right Atrium

-Blood enters the heart through the atria -Posterior wall is smooth -Anterior wall is rough, pectinate muscles extending into auricle

Fibrous Pericardium

-Dense irregular CT -Bag attached to diaphragm -Open end fused to CT of vessels entering and leaving heart -Prevents over stretching -anchor

Fibrous Skeleton

-Fibrous skeleton of the heart- CT -Rings arround valve, fuse with one another -Foundation valves attach and prevents overstretching -attachment site for muscle fibers -insulator

Sulci

-Grooves contain coronary blood vessels and fat -marks chamber boundaries

Epicardium

-Innermost layer -Endothelial over CT -Lines the chambers of the heart

Myocardium

-Mid section -Muscular tissue of the heart -Cardiac muscle tissue -pumping

Anterior Interventricular Sulcus

-RT and It ventricles -Connects to posterior interventricular sulcus

Endocardium

-Smooth outer surface -Connective tissue -lines the inside of the chambers of the heart -Forms surface of the valves

Serous Pericardium

-Thin membrane forming double layer -Outer parietal fused to pericardium -Inner-visceral (epicardium) adheres to heart surface -BW layers is pericardial cavity with pericardial fluid

Right Ventricle

-Trabeculae carneae ridges of cardiac muscle on inside conduction system

Auricle

-anterior surface of atria -increases capacity

Layers of the Heart

1) Endocardium 2)Myocardium 3)Epicardium

What are the 3 veins that it receives its blood from?

1) Superior Vena Cava 2) Inferior Vena Cava 3) Coronary Sinus

Through how many pulmonary veins?

4

How many chambers are there in the heart?

4 chambers 2 superior are atria 2 inferior are ventricles

How does the blood get passed through?

Blood passes from right atrium into right ventricle through tricuspid valve

How does blood pass through?

Blood passes from right ventricle through pulmonary valve into pulmonary trunk dividing right and left pulmonary arteries

How does it connect?

Cups of tricuspid connect to chordae tendinae which connect to papillary muscle

Interventricular Septum

Divides left and right ventricle

Myocardial

Hear attack occurs due to lack of blood flow through the coronary arteries to the heart muscle

Where does it receive its blood from?

Lungs

What do the left ventricle do?

Pumps blood throughout body at high pressure

What do the right ventricles do?

Pumps blood short way to lungs at low pressure

In the fetus, blood from the left and right sides of the heart normally mix.

True

Which of the following is a difference between cardiac muscle and skeletal muscle?

Unlike skeletal muscle cells, cardiac muscle cells can be autorhythmic.

Posterior Interventricular Sulcus

Ventricles on posterior part

The P wave of an electrocardiogram represents __________.

atrial depolarization

Which of the following would lead to a decrease in heart rate?

parasympathetic stimulation

aortic semilunar valve

prevents backflow of blood into the left ventricle

pulmonary semilunar valve

prevents backflow of blood into the right ventricle

diastole

relaxation

posterior interventricular artery

runs to the apex of the heart

The heart's natural pacemaker is termed the

sinoatrial node

The role of the atrioventricular node (AV node) is to __________.

slow down impulses so that the atria can contract to fill the adjacent ventricles with blood

anterior interventricular artery

supplies blood to the interventricular septum and anterior walls of both ventricles

right marginal artery

supplies blood to the lateral right side of the myocardium

circumflex artery

supplies blood to the left atrium and posterior walls of the left ventricle

cardiac output

the amount of blood pumped by each ventricle in one minute

stroke volume

the volume of blood pumped by one ventricle with each heartbeat

Which tunic of an artery contains endothelium?

tunica interna/intima

mitral valve

valve between the left atrium and left ventricle


Conjuntos de estudio relacionados

chapter 3 fundamentals of organization structure

View Set

GACE Media Specialist Review Combo 1-25

View Set

Chapter 14 Study Guide | Exam #3

View Set

Week 1: Ch. 6: Individual and Family Homeostasis, Stress, and Adaption

View Set

To Kill a Mockingbird (vehement)

View Set

Excel Essential Training (Office 365/Microsoft 365)

View Set

2.4.2 Module 2 - Online Connections Quiz

View Set

Peds Chapter 51-Nursing Care During a Pediatric Emergency

View Set