ATI TEAS: CARDIOVASCULAR SYSTEM

The heart is enclosed in a double-layered sac called the:

A) Myocardium

B) Endocardium

C) Pericardium

D) Epicardium

Pericardium

Which layer of the heart is responsible for its pumping

action?

A) Myocardium

B) Endocardium

C) Pericardium

D) Epicardium

Myocardium

Blood flows from the left atrium into the left ventricle

through which valve?

A) Tricuspid valve

B) Pulmonary valve

C) Mitral (bicuspid) valve

D) Aortic valve

Which vessels deliver oxygen-rich blood from the lungs to

the heart?

A) Superior and inferior vena cava

B) Pulmonary veins

C) Pulmonary arteries

D) Coronary arteries

Mitral (bicuspid) valve

The valve located between the right atrium and right

ventricle is:

A) Tricuspid valve

B) Pulmonary valve

C) Mitral (bicuspid) valve

D) Aortic valve

Pulmonary veins

The structure responsible for initiating the heartbeat is:

A) Atrioventricular node

B) Bundle of His

C) Purkinje fibers

D) Sinoatrial node

Tricuspid valve

The phase when the heart muscle contracts and pumps

blood is called:

A) Systole

B) Diastole

C) Repolarization

D) Depolarization

Sinoatrial node

Which structure is responsible for preventing the

backflow of blood from the aorta into the left ventricle?

A) Tricuspid valve

B) Mitral valve

C) Aortic valve

D) Pulmonary valve

Aortic valve

The "lub-dub" sound of the heart is produced primarily by:

A) Opening and closing of the atrioventricular and semilunar valves

B) Flow of blood through the chambers

C) Movement of blood from the veins into the atria

D) Contraction of the myocardium

Opening and closing of the atrioventricular and

semilunar valves

Which factor does NOT influence blood pressure?

A) Blood volume

B) Heart rate

C) Blood viscosity

D) ABO blood type

ABO blood type

An acidic blood pH would be a value:

A) Greater than 7.45

B) Less than 7.35

C) Exactly 7.40

D) Between 7.35 and 7.45

Less than 7.35

Which blood type is considered the universal recipient?

A) A

B) B

C) AB

D) O

AB

The blood vessels that carry blood away from the heart

to the rest of the body are called:

A) Veins

B) Capillaries

C) Arteries

D) Venules

Arteries

In the cardiac conduction system, after the SA node

fires, the impulse travels to the:

A) Bundle of His

B) Purkinje fibers

C) Atrioventricular node

D) Ventricular myocardium

Atrioventricular node

During which phase does the heart relax and fill with

blood?

A) Systole

B) Diastole

C) Repolarization

D) Depolarization

Diastole

The largest artery in the body, responsible for carrying

oxygenated blood away from the heart, is the:

A) Pulmonary artery

B) Aorta

C) Superior vena cava

D) Coronary artery

Aorta

Which valve prevents the backflow of blood from the

pulmonary trunk into the right ventricle?

A) Mitral valve

B) Aortic valve

C) Pulmonary valve

D) Tricuspid valve

Pulmonary valve

The "pacemaker" cells of the heart, responsible for setting

the rate of contractions, are located in the:

A) Atrioventricular node

B) Bundle of His

C) Sinoatrial node

D) Purkinje fibers

Sinoatrial node

Blood pressure is usually expressed as two numbers. The

higher number represents:

A) Diastolic pressure

B) Systolic pressure

C) Mean arterial pressure

D) Pulse pressure

Systolic pressure

An individual with Type O blood should NOT receive:

A) O blood

B) A blood

C) AB blood

D) Both B and C

Both B and C

Which component of the vascular system is responsible

for nutrient and gas exchange?

A) Arteries

B) Veins

C) Capillaries

D) Venules

Capillaries

The term "cardiac output" refers to:

A) The amount of blood the heart pumps in one minute

B) The heart rate multiplied by the stroke volume

C) The volume of blood in one cardiac cycle

D) Both A and B

Both A and B

A decrease in blood pH can be caused by:

A) Hyperventilation

B) Decreased carbon dioxide levels

C) Increased bicarbonate levels

D) Accumulation of metabolic acids

Accumulation of metabolic acids

Which of the following is NOT a function of the

cardiovascular system?

A) Regulation of body temperature

B) Production of hormones

C) Transport of nutrients and oxygen to cells

D) Removal of waste products from tissues

Production of hormones

An increase in which factor would lead to a decrease in

blood pressure?

A) Blood volume

B) Vessel diameter

C) Blood viscosity

D) Heart rate

Vessel diameter

In the cardiac cycle, the QRS complex seen in an ECG

represents:

A) Atrial depolarization

B) Ventricular depolarization

C) Atrial repolarization

D) Ventricular repolarization

Ventricular depolarization

The blood vessels that return deoxygenated blood from

the body to the heart are:

A) Arteries

B) Veins

C) Capillaries

D) Arterioles

Veins

The inferior tip of the heart, which points downward

towards the left hip, is called the:

A) Base

B) Apex

C) Septum

D) Atrium

Apex

The difference between systolic and diastolic blood

pressure is known as:

A) Mean arterial pressure

B) Cardiac output

C) Pulse pressure

D) Blood flow resistance

Pulse pressure

Which component of the cardiac conduction system

rapidly transmits impulses to the ventricular muscles, ensuring their

coordinated contraction?

A) SA node

B) AV node

C) Bundle of His

D) Purkinje fibers

Purkinje fibers

Which of the following factors can lead to an increase in

blood pressure?

A) Decreased cardiac output

B) Vasodilation

C) Increased sodium intake

D) Decreased blood volume

Increased sodium intake

Which chamber of the heart receives deoxygenated blood

from the body via the superior and inferior vena cava?

A) Left atrium

B) Left ventricle

C) Right atrium

D) Right ventricle

Right atrium

Which blood type lacks antigens on the surface of the red

blood cells?

A) A

B) B

C) AB

D) O

O

A decrease in which factor can lead to an increase in

blood pressure?

A) Blood viscosity

B) Vessel elasticity

C) Blood volume

D) Resistance to blood flow

Vessel elasticity

In a normal cardiac cycle, the ventricles are filled with

blood during:

A) Ventricular systole

B) Atrial diastole

C) Ventricular diastole

D) Atrial systole

Ventricular diastole