,BIOD 152 Module 5 | Practice Q&A | 2026/2027 | Anatomy | Portage
Learning
1. Which of the following is a primary function of the lymphatic system?
A) Transport of oxygen to tissues
B) Return of interstitial fluid to the bloodstream
C) Production of red blood cells
D) Regulation of blood glucose
Correct Answer: Return of interstitial fluid to the bloodstream
Rationale: The lymphatic system returns excess interstitial fluid to the
bloodstream, maintaining fluid balance. Oxygen transport is circulatory, RBC
production is bone marrow, and glucose regulation is endocrine.
2. What is the correct order of lymph flow through the lymphatic system?
A) Lymph capillaries → lymph vessels → lymph ducts → subclavian veins
B) Lymph vessels → lymph capillaries → lymph ducts → subclavian veins
C) Lymph ducts → lymph capillaries → lymph vessels → subclavian veins
D) Lymph capillaries → lymph ducts → lymph vessels → subclavian veins
Correct Answer: Lymph capillaries → lymph vessels → lymph ducts →
subclavian veins
Rationale: Lymph flows from interstitial fluid into lymphatic capillaries, then
through progressively larger lymphatic vessels, into lymphatic trunks and
ducts, and finally empties into the subclavian veins.
3. True or False: Lymph flows from the heart out to the tissues via lymphatic
vessels.
,A) True
B) False
Correct Answer: False
Rationale: Lymphatic vessels carry lymph one way only—from the tissues
back toward the heart, not from the heart out to tissues. This unidirectional
flow is essential for returning interstitial fluid to the bloodstream.
4. True or False: Fluid inside tissues that is not returned via the veins is
returned to the heart via the lymphatic system.
A) True
B) False
Correct Answer: True
Rationale: Interstitial fluid that is not reabsorbed by venous capillaries enters
lymphatic capillaries and eventually returns to the heart via the lymphatic
system. This maintains fluid balance and prevents edema.
5. Label the organ below (highlighted in blue, indicated by the arrow):
A) Liver
B) Spleen
C) Thymus
D) Pancreas
Correct Answer: Spleen
, Rationale: The spleen is a large lymphatic organ located in the upper left
quadrant of the abdomen. It filters blood, recycles old red blood cells, and
supports immune function.
6. Which statement is FALSE concerning the spleen?
A) It has many afferent and efferent lymph vessels
B) It contains one incoming artery and one outgoing vein
C) It filters blood and removes aged red blood cells
D) It contains white pulp involved in immune responses
Correct Answer: It has many afferent and efferent lymph vessels
Rationale: The spleen does not have multiple afferent and efferent lymph
vessels; it has a single artery (splenic artery) and vein and primarily filters
blood, not lymph. The spleen filters blood and contains white pulp for
immunity.
7. Blood enters the spleen via which vessel?
A) Splenic vein
B) Hepatic artery
C) Splenic artery
D) Renal artery
Correct Answer: Splenic artery
Rationale: The splenic artery supplies oxygenated blood to the spleen. The
splenic vein drains blood from the spleen, and the hepatic and renal arteries
supply other organs.
Learning
1. Which of the following is a primary function of the lymphatic system?
A) Transport of oxygen to tissues
B) Return of interstitial fluid to the bloodstream
C) Production of red blood cells
D) Regulation of blood glucose
Correct Answer: Return of interstitial fluid to the bloodstream
Rationale: The lymphatic system returns excess interstitial fluid to the
bloodstream, maintaining fluid balance. Oxygen transport is circulatory, RBC
production is bone marrow, and glucose regulation is endocrine.
2. What is the correct order of lymph flow through the lymphatic system?
A) Lymph capillaries → lymph vessels → lymph ducts → subclavian veins
B) Lymph vessels → lymph capillaries → lymph ducts → subclavian veins
C) Lymph ducts → lymph capillaries → lymph vessels → subclavian veins
D) Lymph capillaries → lymph ducts → lymph vessels → subclavian veins
Correct Answer: Lymph capillaries → lymph vessels → lymph ducts →
subclavian veins
Rationale: Lymph flows from interstitial fluid into lymphatic capillaries, then
through progressively larger lymphatic vessels, into lymphatic trunks and
ducts, and finally empties into the subclavian veins.
3. True or False: Lymph flows from the heart out to the tissues via lymphatic
vessels.
,A) True
B) False
Correct Answer: False
Rationale: Lymphatic vessels carry lymph one way only—from the tissues
back toward the heart, not from the heart out to tissues. This unidirectional
flow is essential for returning interstitial fluid to the bloodstream.
4. True or False: Fluid inside tissues that is not returned via the veins is
returned to the heart via the lymphatic system.
A) True
B) False
Correct Answer: True
Rationale: Interstitial fluid that is not reabsorbed by venous capillaries enters
lymphatic capillaries and eventually returns to the heart via the lymphatic
system. This maintains fluid balance and prevents edema.
5. Label the organ below (highlighted in blue, indicated by the arrow):
A) Liver
B) Spleen
C) Thymus
D) Pancreas
Correct Answer: Spleen
, Rationale: The spleen is a large lymphatic organ located in the upper left
quadrant of the abdomen. It filters blood, recycles old red blood cells, and
supports immune function.
6. Which statement is FALSE concerning the spleen?
A) It has many afferent and efferent lymph vessels
B) It contains one incoming artery and one outgoing vein
C) It filters blood and removes aged red blood cells
D) It contains white pulp involved in immune responses
Correct Answer: It has many afferent and efferent lymph vessels
Rationale: The spleen does not have multiple afferent and efferent lymph
vessels; it has a single artery (splenic artery) and vein and primarily filters
blood, not lymph. The spleen filters blood and contains white pulp for
immunity.
7. Blood enters the spleen via which vessel?
A) Splenic vein
B) Hepatic artery
C) Splenic artery
D) Renal artery
Correct Answer: Splenic artery
Rationale: The splenic artery supplies oxygenated blood to the spleen. The
splenic vein drains blood from the spleen, and the hepatic and renal arteries
supply other organs.
