Questions About Lymphatic System
Multiple-Choice Questions: Lymphatic System
1. What is the primary function of the lymphatic system?
A) Transport oxygen to cells
B) Produce insulin
C) Return excess tissue fluid to the bloodstream
D) Store calcium
E) Control body temperature
2. What is lymph?
A) A digestive enzyme
B) A type of red blood cell
C) Fluid derived from interstitial fluid that circulates in the lymphatic vessels
D) A type of hormone
E) A muscle cell
3. Which of the following is not a lymphatic organ?
A) Spleen
B) Thymus
C) Lymph node
D) Liver
E) Tonsils
4. Where are lymphocytes primarily produced?
A) Kidney
B) Liver
C) Bone marrow
D) Heart
E) Pancreas
5. Which of the following organs filters blood and helps fight infections?
A) Heart
B) Spleen
C) Lungs
D) Stomach
E) Pancreas
6. What is the role of lymph nodes?
A) To produce digestive enzymes
B) To filter and trap pathogens in lymph
C) To regulate hormone levels
D) To generate nerve impulses
E) To contract muscles
7. Which type of cell is most active in lymph nodes during an immune response?
A) Red blood cells
B) Osteocytes
C) Lymphocytes
D) Chondrocytes
E) Myocytes
8. What is the role of the thymus in the lymphatic system?
A) It produces bile
B) It filters blood
C) It stores lymph
D) It matures T lymphocytes
E) It digests proteins
9. Which lymphatic organ is located in the upper left portion of the abdominal cavity?
A) Appendix
B) Pancreas
C) Thymus
D) Spleen
E) Liver
10. What is chyle?
A) Hormone secreted by lymph nodes
B) A mixture of lymph and digested fats
C) Protein released by B cells
D) Type of lymphocyte
E) Bacterial toxin
11. What is the function of tonsils in the immune system?
A) Oxygen exchange
B) Filtering blood
C) First line of defense against ingested or inhaled pathogens
D) Controlling hormones
E) Storing enzymes
12. Which vessel transports lymph back into the circulatory system?
A) Aorta
B) Carotid artery
C) Thoracic duct
D) Pulmonary vein
E) Renal artery
13. What do lymphatic capillaries absorb?
A) Red blood cells
B) Oxygen
C) Hormones
D) Excess interstitial fluid
E) Digestive enzymes
14. The right lymphatic duct drains lymph from:
A) The entire body
B) Left leg and abdomen
C) Right arm, right side of head and thorax
D) Both arms
E) Digestive tract only
15. What type of muscle helps move lymph through the lymphatic system?
A) Cardiac muscle
B) Skeletal muscle
C) Smooth muscle
D) Voluntary muscle
E) Involuntary striated muscle
16. Which of the following is a major difference between the lymphatic and circulatory systems?
A) The lymphatic system contains arteries
B) Lymph is oxygenated
C) The lymphatic system has no central pump
D) The lymphatic system transports glucose
E) Blood and lymph move at the same pressure
17. Which cells produce antibodies in the lymphatic system?
A) T cells
B) Natural killer cells
C) Platelets
D) Plasma cells
E) Erythrocytes
18. Which disorder is characterized by swelling due to blocked lymphatic drainage?
A) Anemia
B) Lymphedema
C) Arthritis
D) Hypertension
E) Bronchitis
19. Which structure allows lymph to enter but not exit the lymph node initially?
A) Efferent lymphatic vessels
B) Sinusoids
C) Afferent lymphatic vessels
D) Valve flaps
E) Capillaries
20. What is the immune surveillance role of the lymphatic system?
A) Monitoring oxygen levels
B) Monitoring blood glucose
C) Detecting pathogens and cancer cells in lymph
D) Balancing electrolytes
E) Managing body temperature
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Answer Key with Explanations
1. C – The lymphatic system collects and returns excess interstitial fluid to the bloodstream.
2. C – Lymph is a clear fluid that originates from interstitial fluid and travels through lymph vessels.
3. D – The liver is not a lymphatic organ.
4. C – Lymphocytes are produced in the bone marrow.
5. B – The spleen filters blood and helps fight infection.
6. B – Lymph nodes filter lymph and trap pathogens.
7. C – Lymphocytes are the key immune cells active during responses in lymph nodes.
8. D – The thymus matures T lymphocytes.
9. D – The spleen is in the upper left abdomen.
10. B – Chyle is lymph mixed with fats absorbed from the intestines.
11. C – Tonsils help detect and neutralize pathogens from air or food.
12. C – The thoracic duct returns lymph to the circulatory system at the subclavian vein.
13. D – Lymphatic capillaries absorb excess interstitial fluid.
14. C – The right lymphatic duct drains the right arm, head, and thorax.
15. B – Skeletal muscle contractions assist lymph flow.
16. C – The lymphatic system has no heart-like pump; it relies on valves and muscles.
17. D – Plasma cells (mature B cells) produce antibodies.
18. B – Lymphedema is swelling caused by lymphatic blockage.
19. C – Afferent vessels bring lymph into the lymph nodes.
20. C – The immune system uses lymph nodes to detect foreign pathogens and abnormal cells.
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