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Question: A molecule of hemoglobin ________.
Choices:
is shaped like a biconcave disk packed almost entirely with iron
contains four glycoprotein units studded with oxygen
consists of four globin proteins, each bound to a molecule of heme
can carry up to 120 molecules of oxygen
Question: Which of the formed elements arise from myeloid stem cells?
Choices:
B cells
natural killer cells
platelets
all of the above
Question: Which of the following statements about blood is true?
Choices:
Blood is about 92 percent water.
Blood is slightly more acidic than water.
Blood is slightly more viscous than water.
Blood is slightly more salty than seawater.
Question: Which of the following statements about mature, circulating erythrocytes is true?
Choices:
They have no nucleus.
They are packed with mitochondria.
They survive for an average of 4 days.
All of the above
Question: Interleukins are associated primarily with which of the following?
Choices:
production of various lymphocytes
immune responses
inflammation
all of the above
Question: Which of the following statements about albumin is true?
Choices:
It draws water out of the blood vessels and into the body's tissues.
It is the most abundant plasma protein.
It is produced by specialized leukocytes called plasma cells.
All of the above are true.
Question: A patient has been suffering for 2 months with a chronic, watery diarrhea. A blood test is likely to reveal ________.
Choices:
a hematocrit below 30 percent
hypoxemia
anemia
polycythemia
Question: Which of the following plasma proteins is not produced by the liver?
Choices:
fibrinogen
alpha globulin
beta globulin
immunoglobulin
Question: The production of healthy erythrocytes depends upon the availability of ________.
Choices:
copper
zinc
vitamin B12
copper, zinc, and vitamin B12
Question: Aging and damaged erythrocytes are removed from the circulation by ________.
Choices:
myeoblasts
monocytes
macrophages
mast cells
Question: Which of the following statements about erythropoietin is true?
Choices:
It facilitates the proliferation and differentiation of the erythrocyte lineage.
It is a hormone produced by the thyroid gland.
It is a hemopoietic growth factor that prompts lymphoid stem cells to leave the bone marrow.
Both a and b are true.
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