chapter 4 test

the life span of the rbc is approx?

120 days

the formed elements make up about _________ percent of the whole blood volume

45

five components that are found in a CBC with diff. are

WBC RBC, hemoglobin, hematocrit, differential

which blood vessels generally carry blood that is high in oxygen?

arteries

the function of the erythrocyte is to

carry oxygen

the function of the leukocyte is to

fight infection

the tricuspid and bicuspid valves are associated with the

heart

one of the coronary arteries becomes occluded. What could possibly happen to the patient?

heart attack

what is the substance in erythrocytes that carry oxygen?

hemoglobin

the buffy coat consists of

leukocytes and thrombocytes

what happens when a coronary artery becomes occluded?

myocardial infarction

when a patient has a mastectomy, venipuncture should be avoided on the affected side because the

patient is more susceptible to infection

the fluid portion of anticoagulated whole blood that contains fibrinogen is called the

plasma

difference between serum and plasma speciments

plasma contains fibrinogen which needs an anticoagulant and plasma needs a clot activator

what is the difference between plasma and serum?

plasma contains fibrinogen; serum does not

The formed elements of blood found inside a tuve drawn with an anticoagulant are

plasma, buffy coat, and erythrocytes

which cells contribute most to blood clotting?

platelets

which does not carry oxygenated blood?

pulmonary artery

blood flows from the right atrium into the right ventricle. From this point, it is pumped through the

pulmonary artery to the lungs

the ventricles of the heart are principally responsible for

pumping blood

where does the electrical impulse start in the heart?

sinoatrial node

which is referred to as the pacemaker of the heart?

sinoatrial node

Unoxygenated blood from the head and neck region returns to the heart via the

superior vena cava

what is the function of the coronary arteries?

they supply oxygenated blood to the heart muscle

which of the following is NOT a leukocyte

thrombocyte

why does the left ventricle of the heart have such a thick muscular wall?

to pump blood to all parts of the body

the main function of the circulatory system is to provide

transportation