,BIOD152/BIOD 152 Module 5 Exam | Essential Human
Anatomy & Physiology II with Lab | Portage Learning | Q & A |
2026/2027 Edition (PDF)
1. Which of the following best describes the primary function of the lymphatic system?
A) To transport oxygen and carbon dioxide throughout the body
B) To return interstitial fluid to the bloodstream and defend against disease
C) To regulate blood pressure through vasoconstriction
D) To produce red blood cells in the red bone marrow
Correct Answer: To return interstitial fluid to the bloodstream and defend against disease
Rationale: The lymphatic system has three primary functions: returning excess interstitial fluid (lymph)
to the bloodstream, transporting dietary lipids from the digestive system, and defending the body
against pathogens. It does not transport respiratory gases or produce red blood cells.
2. What is the composition of lymph most similar to?
A) Whole blood
B) Blood plasma
C) Cerebrospinal fluid
D) Intracellular fluid
Correct Answer: Blood plasma
Rationale: Lymph is a clear, watery fluid that originates as interstitial fluid. Its composition is similar to
blood plasma but with a lower concentration of proteins. It does not contain red blood cells or platelets
like whole blood.
3. Which of the following is NOT a function of the lymphatic system?
A) Returning leaked plasma proteins to the blood
B) Transporting dietary lipids from the digestive tract
,C) Producing erythrocytes (red blood cells)
D) Housing and supporting lymphocytes
Correct Answer: Producing erythrocytes (red blood cells)
Rationale: Erythropoiesis (red blood cell production) occurs in the red bone marrow, not the lymphatic
system. The lymphatic system is responsible for fluid balance, lipid absorption, and immune defense.
4. Lymphatic capillaries differ from blood capillaries in that lymphatic capillaries:
A) Are more permeable and have a larger diameter
B) Transport oxygenated blood
C) Are composed of smooth muscle
D) Contain valves that prevent backflow of blood
Correct Answer: Are more permeable and have a larger diameter
Rationale: Lymphatic capillaries are highly permeable, with overlapping endothelial cells that allow
interstitial fluid and large molecules to enter easily. They are also larger in diameter than blood
capillaries. They do not transport blood.
5. Which of the following structures is considered a primary lymphoid organ?
A) Lymph node
B) Spleen
C) Thymus
D) Tonsil
Correct Answer: Thymus
, Rationale: Primary lymphoid organs are where lymphocytes mature and become immunocompetent.
The thymus is the site of T-lymphocyte maturation. Bone marrow is the site of B-lymphocyte
maturation. Lymph nodes, spleen, and tonsils are secondary lymphoid organs.
6. Where do B lymphocytes mature?
A) Thymus
B) Bone marrow
C) Spleen
D) Lymph nodes
Correct Answer: Bone marrow
Rationale: B lymphocytes mature in the red bone marrow, which is a primary lymphoid organ. T
lymphocytes mature in the thymus. The spleen and lymph nodes are secondary lymphoid organs where
mature lymphocytes encounter antigens.
7. Which organ is the largest lymphatic organ and serves as a filter for blood?
A) Thymus
B) Spleen
C) Tonsils
D) Peyer's patches
Correct Answer: Spleen
Rationale: The spleen is the largest lymphatic organ, located in the upper left quadrant of the abdomen.
It filters blood, removes old red blood cells, stores platelets, and houses lymphocytes and macrophages.
8. Which of the following statements about the spleen is FALSE?
A) It is located in the left side of the abdomen
B) It removes old platelets and red blood cells from circulation
Anatomy & Physiology II with Lab | Portage Learning | Q & A |
2026/2027 Edition (PDF)
1. Which of the following best describes the primary function of the lymphatic system?
A) To transport oxygen and carbon dioxide throughout the body
B) To return interstitial fluid to the bloodstream and defend against disease
C) To regulate blood pressure through vasoconstriction
D) To produce red blood cells in the red bone marrow
Correct Answer: To return interstitial fluid to the bloodstream and defend against disease
Rationale: The lymphatic system has three primary functions: returning excess interstitial fluid (lymph)
to the bloodstream, transporting dietary lipids from the digestive system, and defending the body
against pathogens. It does not transport respiratory gases or produce red blood cells.
2. What is the composition of lymph most similar to?
A) Whole blood
B) Blood plasma
C) Cerebrospinal fluid
D) Intracellular fluid
Correct Answer: Blood plasma
Rationale: Lymph is a clear, watery fluid that originates as interstitial fluid. Its composition is similar to
blood plasma but with a lower concentration of proteins. It does not contain red blood cells or platelets
like whole blood.
3. Which of the following is NOT a function of the lymphatic system?
A) Returning leaked plasma proteins to the blood
B) Transporting dietary lipids from the digestive tract
,C) Producing erythrocytes (red blood cells)
D) Housing and supporting lymphocytes
Correct Answer: Producing erythrocytes (red blood cells)
Rationale: Erythropoiesis (red blood cell production) occurs in the red bone marrow, not the lymphatic
system. The lymphatic system is responsible for fluid balance, lipid absorption, and immune defense.
4. Lymphatic capillaries differ from blood capillaries in that lymphatic capillaries:
A) Are more permeable and have a larger diameter
B) Transport oxygenated blood
C) Are composed of smooth muscle
D) Contain valves that prevent backflow of blood
Correct Answer: Are more permeable and have a larger diameter
Rationale: Lymphatic capillaries are highly permeable, with overlapping endothelial cells that allow
interstitial fluid and large molecules to enter easily. They are also larger in diameter than blood
capillaries. They do not transport blood.
5. Which of the following structures is considered a primary lymphoid organ?
A) Lymph node
B) Spleen
C) Thymus
D) Tonsil
Correct Answer: Thymus
, Rationale: Primary lymphoid organs are where lymphocytes mature and become immunocompetent.
The thymus is the site of T-lymphocyte maturation. Bone marrow is the site of B-lymphocyte
maturation. Lymph nodes, spleen, and tonsils are secondary lymphoid organs.
6. Where do B lymphocytes mature?
A) Thymus
B) Bone marrow
C) Spleen
D) Lymph nodes
Correct Answer: Bone marrow
Rationale: B lymphocytes mature in the red bone marrow, which is a primary lymphoid organ. T
lymphocytes mature in the thymus. The spleen and lymph nodes are secondary lymphoid organs where
mature lymphocytes encounter antigens.
7. Which organ is the largest lymphatic organ and serves as a filter for blood?
A) Thymus
B) Spleen
C) Tonsils
D) Peyer's patches
Correct Answer: Spleen
Rationale: The spleen is the largest lymphatic organ, located in the upper left quadrant of the abdomen.
It filters blood, removes old red blood cells, stores platelets, and houses lymphocytes and macrophages.
8. Which of the following statements about the spleen is FALSE?
A) It is located in the left side of the abdomen
B) It removes old platelets and red blood cells from circulation
