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Blood: Body Fluids and Circulation Video Lecture | Biology Class 11 - NEET
FAQs on Blood: Body Fluids and Circulation Video Lecture - Biology Class 11 - NEET
| 1. What are the main components of blood and their functions? |  |
Ans. The main components of blood include red blood cells (erythrocytes), white blood cells (leukocytes), platelets (thrombocytes), and plasma. Red blood cells transport oxygen from the lungs to the body and return carbon dioxide for exhalation. White blood cells are crucial for the immune response, helping to fight infections. Platelets are involved in blood clotting to prevent excessive bleeding, and plasma is the liquid portion that carries nutrients, hormones, and waste products.
| 2. How does the circulatory system work with the blood? | |
Ans. The circulatory system, also known as the cardiovascular system, consists of the heart, blood vessels, and blood. It functions by pumping blood through the heart, which delivers oxygen and nutrients to cells while removing waste products. The system includes two main circuits: the pulmonary circuit, where blood is oxygenated in the lungs, and the systemic circuit, where oxygen-rich blood is distributed to the rest of the body.
| 3. What role does blood play in maintaining homeostasis? | |
Ans. Blood helps maintain homeostasis by regulating body temperature, pH levels, and electrolyte balance. It acts as a transport medium for hormones and nutrients, helping to ensure that cells receive the necessary substances for metabolism. Blood also plays a role in immune responses and the healing process, contributing to overall stability in the body's internal environment.
| 4. What are common blood disorders, and how do they affect circulation? | |
Ans. Common blood disorders include anemia, which reduces the number of red blood cells and can lead to fatigue; thrombocytopenia, which involves low platelet counts and increases bleeding risk; and leukemia, a type of cancer that affects white blood cells. These disorders can disrupt normal circulation, leading to symptoms such as weakness, increased bleeding, or heightened susceptibility to infections.
| 5. How is blood type determined, and why is it important for transfusions? | |
Ans. Blood type is determined by the presence or absence of specific antigens on the surface of red blood cells, with the main groups being A, B, AB, and O, along with the Rh factor (positive or negative). It is crucial for blood transfusions because receiving incompatible blood can lead to serious immune reactions, which can be life-threatening. Matching blood types ensures safe transfusions and minimizes risks.
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