Clotting and lymph — practice questions

Question 1 · difficulty L1 · recall

A feature distinguishing lymph from blood:

• A. normally lacks red blood cells and has less protein
• B. contains more red cells than blood
• C. has no white cells
• D. is confined to arteries

Question 2 · difficulty L1 · recall

The insoluble protein threads forming the clot mesh:

• A. globulin
• B. fibrin
• C. fibrinogen
• D. albumin

Question 3 · difficulty L1 · recall

Which plasma protein is converted into insoluble fibrin during blood clotting?

• A. Fibrinogen
• B. Albumin
• C. Globulin
• D. Haemoglobin

Question 4 · difficulty L2 · understanding

What is the direct action of thrombin during the clotting cascade?

• A. It converts fibrin into fibrinogen
• B. It converts fibrinogen into fibrin
• C. It carries oxygen to damaged tissue
• D. It dissolves the platelet plug

Question 5 · difficulty L3 · application

A sample of plasma is allowed to clot and the clot is removed. What is the remaining fluid called?

• A. Whole blood
• B. Lymph
• C. Serum
• D. Haemolysate

Question 6 · difficulty L3 · application

Fluid collected from a lymphatic vessel draining the small intestine contains unusually high levels of absorbed lipid. What feature of lymphatic function explains this?

• A. Lymph converts glucose directly into triglyceride
• B. Lymph is the main carrier of respiratory oxygen
• C. Lymph contains more erythrocytes than blood
• D. Transport of absorbed intestinal fats

Question 7 · difficulty L4 · analysis

Capillary filtration continuously moves some fluid and plasma proteins into tissue spaces. What role of the lymphatic system helps maintain fluid balance?

• A. It returns excess interstitial fluid and leaked proteins to the bloodstream
• B. It converts tissue fluid into new erythrocytes before returning it to circulation
• C. It prevents any plasma from leaving capillaries
• D. It pumps blood through the pulmonary circuit

Question 8 · difficulty L5 · analysis

A person has normal platelet number and normal fibrinogen concentration, but the pathway that activates prothrombin to thrombin is blocked. Which event in clot formation will fail most directly?

• A. Initial contact of platelets with a damaged vessel
• B. Formation of a stable fibrin mesh
• C. Transport of lymph through lacteals
• D. Production of erythrocytes in bone marrow