Week 1 - Lymphatic system

Question 1

What type of system do lymphatic vessels form? a) Closed loop b) One-way system c) Two-way system d) Circular system

Answer 1

b) One-way system

Question 2

Which vessels are the smallest in the lymphatic system? a) Lymphatic ducts b) Lymphatic trunks c) Lymphatic capillaries d) Lymphatic veins

Answer 2

c) Lymphatic capillaries

Question 3

What allows lymphatic capillaries to be very permeable? a) Smooth muscle contraction b) Tight endothelial cells c) Loosely overlapping endothelial cells d) High interstitial pressure

Answer 3

c) Loosely overlapping endothelial cells

Question 4

Which vessels have valves to prevent backflow? a) Lymphatic veins b) Lymphatic vessels c) Lymphatic ducts d) Lymphatic capillaries

Answer 4

b) Lymphatic vessels

Question 5

Into which veins does the thoracic duct dump lymph? a) Right jugular and right subclavian veins b) Left jugular and left subclavian veins c) Inferior vena cava d) Right and left brachiocephalic veins

Answer 5

b) Left jugular and left subclavian veins

Question 6

What is the primary function of the lymphatic system? a) Transporting oxygen b) Returning fluid to blood circulation c) Removing carbon dioxide d) Synthesising proteins

Answer 6

b) Returning fluid to blood circulation

Question 7

Which organ cleanses blood and stores RBCs and platelets? a) Thymus b) Lymph node c) Spleen d) Tonsils

Answer 7

c) Spleen

Question 8

Where are the highest concentrations of lymph nodes found? a) Neck, armpit, groin b) Brain c) Heart d) Liver

Answer 8

a) Neck, armpit, groin

Question 9

What is the main function of the thymus? a) Producing red blood cells b) Developing T-cells c) Storing platelets d) Filtering lymph

Answer 9

b) Developing T-cells

Question 10

Which of the following is NOT a primary lymphoid organ? a) Thymus b) Red bone marrow c) Spleen d) None of the above

Answer 10

c) Spleen

Question 11

Which lymphoid tissue is associated with mucous membranes? a) MALT b) Spleen c) Bone marrow d) Thymus

Answer 11

a) MALT

Question 12

What does MALT stand for? a) Mucosal-Associated Lymphatic Tissue b) Mucosa-Associated Lymphoid Tissue c) Mucus-Activated Lymphoid Tissue d) Mucosal-Adhering Lymphatic Tissue

Answer 12

b) Mucosa-Associated Lymphoid Tissue

Question 13

Which of the following is a function of lymph nodes? a) Storing fat b) Filtering blood c) Cleansing lymph d) Producing hormones

Answer 13

c) Cleansing lymph

Question 14

Which lymphatic structure absorbs fat from the small intestine? a) Lymph node b) Lacteal c) Thymus d) Peyer’s patches

Answer 14

b) Lacteal

Question 15

Which organ is responsible for destroying old red blood cells? a) Thymus b) Spleen c) Lymph nodes d) Tonsils

Answer 15

b) Spleen

Question 16

What is lymph? a) Plasma b) Interstitial fluid c) Blood d) A type of white blood cell

Answer 16

b) Interstitial fluid

Question 17

Which lymphoid organ traps pathogens entering through the pharynx? a) Spleen b) Thymus c) Tonsils d) Lymph nodes

Answer 17

c) Tonsils

Question 18

Which lymphoid organ is most active during childhood? a) Spleen b) Thymus c) Tonsils d) Appendix

Answer 18

b) Thymus

Question 19

What is the function of lymphatic valves? a) Increase pressure b) Pump lymph c) Prevent backflow d) Transport fat

Answer 19

c) Prevent backflow

Question 20

Which condition is characterised by swelling due to a blockage in the lymphatic system? a) Buboes b) Lymphedema c) Lymphangitis d) Spleen damage

Answer 20

b) Lymphedema

Question 21

Which organ is a secondary lymphoid organ? a) Thymus b) Red bone marrow c) Spleen d) None of the above

Answer 21

c) Spleen

Question 22

What type of tissue is lymphoid tissue primarily composed of? a) Cartilage b) Reticular connective tissue c) Adipose tissue d) Muscle tissue

Answer 22

b) Reticular connective tissue

Question 23

What is the main component of diffuse lymphoid tissue? a) Tightly packed lymph cells b) Loosely arranged lymphoid cells c) Blood cells d) Fat cells

Answer 23

b) Loosely arranged lymphoid cells

Question 24

Which organ serves as a ‘lookout’ for the immune system? a) Lymph nodes b) Spleen c) Thymus d) Tonsils

Answer 24

a) Lymph nodes

Question 25

What is the first lymphoid organ to develop in an embryo? a) Spleen b) Thymus c) Lymph nodes d) Tonsils

Answer 25

b) Thymus