CLS 111 Exam 1 Arizona College
Questions and Answers Rated A+
What is the primary function of blood in the human body?
✔✔The primary function of blood is to transport oxygen, nutrients, and waste products
throughout the body.
What are platelets, and why are they important?
✔✔Platelets are cell fragments that help in blood clotting, preventing excessive bleeding when
injuries occur.
How does hemoglobin facilitate oxygen transport?
✔✔Hemoglobin binds to oxygen in the lungs and releases it to tissues, making it essential for
oxygen transport.
What is the role of white blood cells in the immune system?
✔✔White blood cells protect the body by identifying and destroying pathogens like bacteria and
viruses.
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, Why is it necessary to perform blood typing before transfusions?
✔✔Blood typing ensures compatibility between donor and recipient, preventing harmful
immune reactions during transfusions.
What is the difference between serum and plasma?
✔✔Plasma contains clotting factors, while serum is plasma without the clotting proteins, used in
lab tests.
How do centrifuges help in laboratory testing?
✔✔Centrifuges separate blood components, such as plasma, red blood cells, and white blood
cells, by spinning at high speeds.
What is the importance of universal precautions in the lab?
✔✔Universal precautions prevent the spread of infections by treating all bodily fluids as
potentially infectious.
What is a Complete Blood Count (CBC), and why is it performed?
✔✔A CBC measures the number of red blood cells, white blood cells, platelets, and hemoglobin
to assess overall health and detect conditions like anemia or infection.
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Questions and Answers Rated A+
What is the primary function of blood in the human body?
✔✔The primary function of blood is to transport oxygen, nutrients, and waste products
throughout the body.
What are platelets, and why are they important?
✔✔Platelets are cell fragments that help in blood clotting, preventing excessive bleeding when
injuries occur.
How does hemoglobin facilitate oxygen transport?
✔✔Hemoglobin binds to oxygen in the lungs and releases it to tissues, making it essential for
oxygen transport.
What is the role of white blood cells in the immune system?
✔✔White blood cells protect the body by identifying and destroying pathogens like bacteria and
viruses.
1
, Why is it necessary to perform blood typing before transfusions?
✔✔Blood typing ensures compatibility between donor and recipient, preventing harmful
immune reactions during transfusions.
What is the difference between serum and plasma?
✔✔Plasma contains clotting factors, while serum is plasma without the clotting proteins, used in
lab tests.
How do centrifuges help in laboratory testing?
✔✔Centrifuges separate blood components, such as plasma, red blood cells, and white blood
cells, by spinning at high speeds.
What is the importance of universal precautions in the lab?
✔✔Universal precautions prevent the spread of infections by treating all bodily fluids as
potentially infectious.
What is a Complete Blood Count (CBC), and why is it performed?
✔✔A CBC measures the number of red blood cells, white blood cells, platelets, and hemoglobin
to assess overall health and detect conditions like anemia or infection.
2
