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Blood and its Components Video Lecture | Science & Technology for State PSC Exams - BPSC (Bihar)

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FAQs on Blood and its Components Video Lecture - Science & Technology for State PSC Exams - BPSC (Bihar)

1. What are the main components of blood?
Ans. Blood is composed of several components, including red blood cells, white blood cells, platelets, and plasma. Red blood cells carry oxygen to the body's tissues, white blood cells help fight infections, platelets help in blood clotting, and plasma is the liquid part of blood that carries nutrients, hormones, and waste products.
2. How is blood type determined?
Ans. Blood type is determined by the presence or absence of specific antigens on the surface of red blood cells. The most common blood typing system is the ABO system, which categorizes blood into four types: A, B, AB, and O. Another important factor is the Rh factor, which determines whether the blood is Rh positive (+) or Rh negative (-). Blood type is determined through a simple blood test.
3. What is the function of platelets in blood?
Ans. Platelets play a crucial role in blood clotting. When a blood vessel is damaged, platelets rush to the site and form a plug to stop bleeding. They also release chemicals that help in the clotting process. Without platelets, even a small cut could lead to excessive bleeding.
4. Why are white blood cells important for the immune system?
Ans. White blood cells, also known as leukocytes, are a vital part of the immune system. They help protect the body against infections and diseases by identifying and destroying harmful substances, such as bacteria, viruses, and cancer cells. White blood cells also play a role in regulating the immune response and promoting healing.
5. How does plasma contribute to the functioning of blood?
Ans. Plasma is the liquid component of blood and makes up about 55% of its total volume. It carries various substances throughout the body, including nutrients, hormones, antibodies, waste products, and clotting factors. Plasma helps maintain blood pressure, pH balance, and body temperature. It also aids in transporting dissolved gases, such as oxygen and carbon dioxide.
85 videos|305 docs|208 tests

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