BIOL 251 W2-Quiz 2 Questions and Answers Latest Updated 2026/2027 (Graded A+)-
American Public University
Attempt 1
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Question 1 points
Which of the following is/are true of platelets?
Platelets are sometimes referred to as thrombocytes.
Platelets are actually pieces of large cells called a megakaryocytes.
Platelets are very small, but very numerous, sometimes numbering 150,000 to 160,000 per microliter of blood.
Platelets are critical to hemostasis, the stoppage of blood flow following damage to a vessel.
All of the above are true.
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Question 2 points
Which of the following is/are true of red blood cells?
Their anatomical name is also erythrocyte.
In their mature form, they do not contain a nucleus.
Immature erythrocytes that may still contain fragments of organelles are called reticulocytes.
They contain one molecule of hemoglobin.
All of the above are true.
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Question 3 points
Which of the following is the primary function of red blood cells?
To help in the process of hemostasis, the stoppage of blood flow following damage to a blood vessel.
To carry oxygen from the lungs to all cells of the body; to carry some carbon dioxide from the cells back to the
lungs.
To help fight off infection as part of the immune system.
To bind some ions and molecules in the blood which are not water-soluble.
To bind and carry away waste products from most cells of the body.
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, Question 4 points
In case an American needs an emergency blood transfusion, blood with the following blood type(s) can be given without
fear of agglutination?
O+
AB+
Blood with the same blood type as the person needing the transfusion.
Either C or D can be given.
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Question 5 points
Which of the following is true of leukocytes?
They are very similar in appearance and function as red blood cells.
Leukocytes are smaller than and more numerous than red blood cells.
Like red blood cells, mature leukocytes also lack a nucleus and other intracellular organelles.
Leukocytes always remain in circulation throughout the body.
The leukocyte is a major component of the body's defenses against disease.
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Question 6 points
Which of the following is/are true of the molecule named hemoglobin?
It is a very simple protein structure.
It can bind to only one molecule of oxygen.
It numbers approximately 1 to 2 million in each erythrocyte.
It contains four folded chains of a protein named globin.
It functions as the nucleus in all mature erythrocytes.
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Question 7 points
What is the most common leukocyte in the human body?
natural killer (NK) cells
lymphocytes
basophils
eosinophils
neutrophils
American Public University
Attempt 1
Submission View
Your quiz has been submitted successfully.
Question 1 points
Which of the following is/are true of platelets?
Platelets are sometimes referred to as thrombocytes.
Platelets are actually pieces of large cells called a megakaryocytes.
Platelets are very small, but very numerous, sometimes numbering 150,000 to 160,000 per microliter of blood.
Platelets are critical to hemostasis, the stoppage of blood flow following damage to a vessel.
All of the above are true.
View question 1 feedback
Question 2 points
Which of the following is/are true of red blood cells?
Their anatomical name is also erythrocyte.
In their mature form, they do not contain a nucleus.
Immature erythrocytes that may still contain fragments of organelles are called reticulocytes.
They contain one molecule of hemoglobin.
All of the above are true.
View question 2 feedback
Question 3 points
Which of the following is the primary function of red blood cells?
To help in the process of hemostasis, the stoppage of blood flow following damage to a blood vessel.
To carry oxygen from the lungs to all cells of the body; to carry some carbon dioxide from the cells back to the
lungs.
To help fight off infection as part of the immune system.
To bind some ions and molecules in the blood which are not water-soluble.
To bind and carry away waste products from most cells of the body.
View question 3 feedback
, Question 4 points
In case an American needs an emergency blood transfusion, blood with the following blood type(s) can be given without
fear of agglutination?
O+
AB+
Blood with the same blood type as the person needing the transfusion.
Either C or D can be given.
View question 4 feedback
Question 5 points
Which of the following is true of leukocytes?
They are very similar in appearance and function as red blood cells.
Leukocytes are smaller than and more numerous than red blood cells.
Like red blood cells, mature leukocytes also lack a nucleus and other intracellular organelles.
Leukocytes always remain in circulation throughout the body.
The leukocyte is a major component of the body's defenses against disease.
View question 5 feedback
Question 6 points
Which of the following is/are true of the molecule named hemoglobin?
It is a very simple protein structure.
It can bind to only one molecule of oxygen.
It numbers approximately 1 to 2 million in each erythrocyte.
It contains four folded chains of a protein named globin.
It functions as the nucleus in all mature erythrocytes.
View question 6 feedback
Question 7 points
What is the most common leukocyte in the human body?
natural killer (NK) cells
lymphocytes
basophils
eosinophils
neutrophils
