circ ulatory system

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Which type of cell carries oxygen around the body?

red blood cells

What does the pulmonary vein supply the heart with?

supplies the heart with oxygenated blood from the lungs.

Which of these is NOT a function of blood?

the digestion of nutrients

which vessels carry blood to the heart

veins

Systolic blood pressure is measured when ...

ventricles contract

Systolic pressure measures which of the following?

ventricular contraction

Which of the following blood types may be referred to as the universal donor?

O-

Which heart valves are NOT actively closed by the contraction of muscular structures?

Semilunar valves

What is it called when plaque builds up in the arteries?

atherosclerosis

Arteries

away from the heart

What shape are red blood cells?

biconcave disks.

Which vessels supply the heart with blood?

coronary arteries

The average blood pressure is

120/80

The average human heart beats ...

72 bpm

Rank the following blood vessels in order of their average pressure, from highest to lowest: artery, vein, arteriole, venule, aorta, capillary.

Aorta > artery > arteriole > capillary > venule > vein

In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?

Both are closed

What layer of the heart would be most immediately susceptible to infections caused by bacteria circulating in the blood?

Endocardium

What physical feature of large systemic arteries (resistance vessels) makes them relatively more responsive to changes in intracellular calcium concentrations?

Thick tunica media

How can the circulatory system promote heat retention/conservation, such as on a cold day?

Vasoconstriction

what is a net work of capillaries called?

a capillary bed

A blood clot in the brain can cause which event?

a stroke

At the instant following the second heart sound, which heart valves are open?

alll valves are closed

Which type of vessel needs to withstand high blood pressure?

an artery

A low red blood cell count or a reduced amount of hemoglobin is called _____.

anemia

which vessels carry blood away from the heart

arteries

What is a thrombus?

blood clot

What are tube-like structures that include the arteries, arterioles, capillaries, venules, and veins?

blood vessels

what is leukemia

cancer of blood cell producing tissue

veins

carry blood to the heart

what creates the "lub dub" heart sounds

closing of valves

lower number of pressure

distolic

What kind of signal does the cardiac pacemaker use?

electrical

Which of the following is NOT transported in plasma?

electrolytes & urea are and bile isnt

Which of the following is a possible result of improper blood flow in a coronary artery?

heart attack

Which of the following compounds transport oxygen in the blood?

hemoglobin

which side of the heart pumps oxygenated blood

left side

In what units is blood pressure measured?

mm/Hg

how thick is the wall of the capillary

one cell

The heart is enclosed in a double-walled sac called the ...

pericardium

Which component of blood is crucial to clotting?

platelets

what promotes blood clotting

platelets

______ circulation takes blood from the heart to the lungs and back.

pulmonary

Which of these vessels carries deoxygenated blood from the heart?

pulmonary artery

What heart chamber does the vena cava empty into?

right atrium

Which part of the heart pumps deoxygenated (oxygen-poor) blood?

right side

The rate at which the heart contracts depends on the ...

sinoatrial node.

higher number in blood pressure

systolic pressure

What does the pulse represent?

the heartbeat

What is plasma?

the liquid component of blood

What is the function of white blood cells?

to be part of the immune system.

What is the function of a valve in a vein?

to prevent reverse blood flow

What is the function of the blood-brain barrier?

to protect the brain from toxins

Why is blood clotting essential?

to reduce blood loss.

The pulmonary arteries carry blood ...

to the lungs

Where does the right ventricle pump blood to?

to the lungs

Why do arteries have thick walls of smooth muscle?

to withstand high pressure

Which type of vessel contains valves?

veins

what is the primary component of blood by volume

water


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