BIO 251 Questions and Answers
Part 1 of 1 - Part 1 100.0/ 100.0 Points
From chapter 18 (18.1-18.6)
Question 1 of 20
5.0/ 5.0 Points
Which of the following is/are correct in describing thrombosis:
A. A condition characterized by excessive numbers of platelets that increases the risk for...
Part 1 of 1 - Part 1 100.0/ 100.0 Points
From chapter 18 (18.1-18.6)
Question 1 of 20
5.0/ 5.0 Points
Which of the following is/are correct in describing thrombosis:
A. A condition characterized by excessive numbers of platelets that increases the risk for
excessive clot formation, a condition known as thrombosis.
B. Thrombosis is a very common, always harmless condition that occurs in the body.
C. A thrombosis is always harmless because the thrombus which is formed always stays
in a blood vessel precisely where it formed.
D. The blood stream contains several different anticoagulants that will result in the
complete, normal breakdown of a thrombus.
E. Two of the above are correct.
,Feedback: Good work; your answer is correct!
Question 2 of 20
5.0/ 5.0 Points
Which of the following is/are true of platelets?
A. They arise from cells called megakaryocytes.
B. They do not contain a nucleus.
C. They play an important part in the clotting of blood.
D. They are not cells.
E. All of the above are true.
Feedback: Good work; your answer is correct!
Question 3 of 20
5.0/ 5.0 Points
Which of the following is/are important in the process named coagulation?
A. A process which can reverse coagulation, named anticoagulation, can only occur
, when one or more medications are administered to the body.
B. Coagulation is a very simple and straight-forward series of only two or three steps.
C. Coagulation is a complicated cascade of reactions that result in the formation of a
mesh of fibrin.
D. Neither an excess number of platelets nor having many too few platelets in the blood
stream will cause any serious reaction.
E. Coagulation can only occur in the presence of two or three different “clotting factors.”
Feedback: Good work; your answer is correct!
Question 4 of 20
5.0/ 5.0 Points
What is the typical lifespan of a leukocyte?
A. The lifespan of a leukocyte is extremely variable, measuring in hours to years or
decades.
B. The lifespan of a leukocyte typically is measured only in hours or days.
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