chapter 18 blood

Plasma is composed of about ___________ % water.

92

In the breakdown of hemoglobin, the globin chains

Are broken down by macrophages into amino acids

Which of the following is the correct sequence in the breakdown of the non-iron portion of the heme?

Heme, biliverdin, bilirubin, conjugated bilirubin, bilirubin derivatives, feces and urine

In the breakdown of hemoglobin, the iron __________?

Is transported by transferrin to the liver, spleen, and bone marrow

Choose the correct statement regarding the function of platelets.

Platelets secrete procoagulants, or clotting factors, which promote blood clotting.

Label the parts of a separated blood sample.

Tube: Plasma, White blood cells/platelets, red blood cells Smear: White blood cells, RBC in smear, platelets

Which of the following factors is the initial stimulus for the release of EPO?

decrease in O2 availability

The most abundant formed elements of the blood is/are

erythrocytes

If an individual's erythrocytes exhibit surface antigen D, the person is said to be Rh negative.

false

The red pigmented protein in erythrocytes that transports oxygen and carbon dioxide is called

hemoglobin

Platelets are formed from

pieces of the megakaryocyte breaking off.

Which component of whole blood plays the greatest role in maintaining normal fluid levels in the cardiovascular system and preventing fluid loss?

plasma

The cell fragments that are a component of blood are

platelets

The component of plasma least likely (under normal conditions) to be present in the same amount in interstitial fluid is

protein

When blood loss is severe, the __________ nervous system helps maintain blood pressure and divert blood to where it is needed most.

sympathetic ( fight or flight)

Anemia is more likely with increasing age because

the amount of red bone marrow decreases

Bilirubin is transported by albumin in the blood to the liver.

true

Iron is transported in the blood by transferrin?

true

The first stage of hemostasis is ___________, where the damaged blood vessel constricts suddenly.

vascular spasm

The "buffy coat" consists of

white blood cells ( leuyocites ) and platelets