NEET Biology: Composition of lymph and its function Practice Questions
15 free multiple-choice questions on Composition of lymph and its function (Human Physiology) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. Which of the following is a major macromolecule dissolved in the lymph?
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Correct answer: B — Lipids (Fats)
As lymph collects waste products and absorbed fats from the body tissues, lipids (fats) are significant components.
Q2. The primary component of lymph that makes it an isotonic fluid is:
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Correct answer: B — Water
Lymph is primarily composed of water (about 90-92%), making it an isotonic fluid.
Q3. Which of the following substances is a major component dissolved in the lymph, reflecting its role in systemic transport?
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Correct answer: B — Urea
Lymph carries metabolic waste products, such as urea, from tissues to the circulatory organs for processing.
Q4. Which type of cells are abundant in the lymph?
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Correct answer: C — Lymphocytes
Lymph is rich in immune cells, particularly lymphocytes (T cells and B cells), which are crucial for the body's defense mechanisms.
Q5. Which type of macromolecule forms the major protein component within the lymph fluid?
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Correct answer: D — Proteins
As an interstitial fluid, lymph contains significant amounts of plasma proteins, such as albumin and globulins, which are crucial for osmotic balance and transport.
Q6. The high concentration of specific dissolved solutes in lymph is primarily related to its function as a transport medium for which substances?
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Correct answer: A — Dissolved salts and proteins
The solutes in lymph include dissolved proteins, fats, and water, which are crucial for transporting materials between tissues.
Q7. Which component primarily carries the absorbed dietary fats from the intestine into the lymphatic system before entering the blood circulation?
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Correct answer: B — Chylomicrons
Dietary fats are packaged into large lipoprotein particles called chylomicrons, which are transported via the lymphatics.
Q8. The presence of lipids in the lymph is important for which physiological function?
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Correct answer: A — Facilitating immunity
Lipids (fats) dissolved in lymph are transported to the lymph nodes where they are processed and distributed, aiding immune response and fat metabolism.
Q9. Which major component of lymph is responsible for the movement of fluid between the lymphatic capillaries and vessels?
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Correct answer: A — lymphatic endothelial lining
The movement of fluid across the lymphatic capillaries is facilitated by the specialized structure of the lymphatic endothelial lining.
Q10. What is the primary solvent medium for the lymph, determining its bulk flow and transport capacity?
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Correct answer: B — Water
Lymph is essentially interstitial fluid. Water constitutes the largest proportion of lymph, making it the primary solvent for the transported substances.
Q11. Which substance is primarily transported within the lymph?
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Correct answer: D — Proteins and wastes
Lymph is formed from interstitial fluid and transports fats (lipids) and proteins absorbed from tissues.
Q12. What is the primary role of the lymphatic system in relation to the lymph?
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Correct answer: C — To maintain osmotic balance and immunity
The lymphatic system, through the circulation of lymph, plays a critical role in maintaining osmotic balance and facilitating immune responses by monitoring the body's environment.
Q13. Where does the majority of lymph originate from?
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Correct answer: C — Spleen
Lymph is formed from the accumulation of tissue fluid in the interstitial spaces of the body and drains into the lymphatic vessels.
Q14. The composition of lymph is similar to tissue fluid, but it differs mainly in its flow direction and ultimate destination. What is the primary difference?
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Correct answer: A — Lymph flows towards the blood circulation, while tissue fluid flows towards the lymphatic vessels.
Both are isotonic, but lymph flows towards the venous system (blood circulation) to return fluid and materials to the body, while tissue fluid moves from tissues into the lymphatic vessels.
Q15. Which function is directly associated with the movement of lymph through the lymphatic vessels?
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Correct answer: B — Removal of excess tissue fluid
Lymphatic circulation functions to collect interstitial fluid and filter it, playing a role in draining excess tissue fluid back into the circulatory system.
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