BIOD 152 Module 5 Exam: Questions &
Answers: Latest Updated A+ Score Solution
BIOD 152 Module 5 Practice Exam
Lymphatic System and Immunity
Instructions: This practice exam covers lymphatic system anatomy, immune cell
functions, and clinical applications. Bold italic text highlights key terms. Each
question includes the correct answer and rationale.
SECTION 1: Lymphatic System Anatomy and Function
1. Label the organ highlighted in blue (also indicated by the arrow):
• A) Thymus
• B) Spleen
• C) Tonsil
• D) Lymph node
Answer: B) 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 .
2. True or False: Fluid inside tissues that is not returned via the veins is returned
to the heart via the lymph system.
• A) True
, • B) False
Answer: A) True
Rationale: Interstitial fluid that is not reabsorbed by venous capillaries enters
lymphatic capillaries and eventually returns to the bloodstream through the
lymphatic system .
3. True or False: Lymph fluid moves in the following order: lymphatic duct →
lymphatic vessels → lymph capillaries → veins.
• A) True
• B) False
Answer: B) False
Rationale: The correct flow is: lymph capillaries → lymphatic vessels →
lymphatic ducts → veins. Lymph capillaries are the smallest vessels where lymph
originates .
4. A patient has lymphedema in his left arm. What lymph vessel would most
likely be obstructed?
• A) Right lymphatic duct
• B) Thoracic duct
• C) Cisterna chyli
• D) Subclavian vein
Answer: B) Thoracic duct
Rationale: The thoracic duct drains lymph from the left side of the body including
the left arm; obstruction here could lead to lymphedema in the left arm .
5. Which of the following statements is false concerning lymph nodes?
, • A) There are more afferent vessels than efferent vessels.
• B) Lymph nodes filter lymph and trap pathogens.
• C) Lymph nodes produce lymph.
• D) Lymph nodes contain lymphocytes.
Answer: C) Lymph nodes produce lymph
Rationale: Lymph nodes filter lymph but do not produce it. Lymph originates from
interstitial fluid .
6. Which 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.
Answer: A) 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 .
7. Blood enters the spleen via the:
• A) Splenic vein
• B) Hepatic artery
• C) Splenic artery
• D) Renal artery
Answer: C) Splenic artery
Rationale: The splenic artery supplies oxygenated blood to the spleen .
, 8. Blood leaving the spleen flows into this vessel which also carries blood
drained from the intestines, stomach, and pancreas:
• A) Inferior vena cava
• B) Hepatic portal vein
• C) Aorta
• D) Superior vena cava
Answer: B) Hepatic portal vein
Rationale: The splenic vein drains blood from the spleen and joins with veins from
the intestines, stomach, and pancreas to form the hepatic portal vein, which
carries blood to the liver .
9. The tonsils contain channels called ___ which trap bacteria:
• A) Sinuses
• B) Crypts
• C) Follicles
• D) Villi
Answer: B) Crypts
Rationale: Tonsillar crypts are invaginations that trap bacteria and particulates to
facilitate immune responses .
10. Which of the following people would you expect to have the largest thymus
gland?
• A) 60-year-old adult
• B) 30-year-old adult
Answers: Latest Updated A+ Score Solution
BIOD 152 Module 5 Practice Exam
Lymphatic System and Immunity
Instructions: This practice exam covers lymphatic system anatomy, immune cell
functions, and clinical applications. Bold italic text highlights key terms. Each
question includes the correct answer and rationale.
SECTION 1: Lymphatic System Anatomy and Function
1. Label the organ highlighted in blue (also indicated by the arrow):
• A) Thymus
• B) Spleen
• C) Tonsil
• D) Lymph node
Answer: B) 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 .
2. True or False: Fluid inside tissues that is not returned via the veins is returned
to the heart via the lymph system.
• A) True
, • B) False
Answer: A) True
Rationale: Interstitial fluid that is not reabsorbed by venous capillaries enters
lymphatic capillaries and eventually returns to the bloodstream through the
lymphatic system .
3. True or False: Lymph fluid moves in the following order: lymphatic duct →
lymphatic vessels → lymph capillaries → veins.
• A) True
• B) False
Answer: B) False
Rationale: The correct flow is: lymph capillaries → lymphatic vessels →
lymphatic ducts → veins. Lymph capillaries are the smallest vessels where lymph
originates .
4. A patient has lymphedema in his left arm. What lymph vessel would most
likely be obstructed?
• A) Right lymphatic duct
• B) Thoracic duct
• C) Cisterna chyli
• D) Subclavian vein
Answer: B) Thoracic duct
Rationale: The thoracic duct drains lymph from the left side of the body including
the left arm; obstruction here could lead to lymphedema in the left arm .
5. Which of the following statements is false concerning lymph nodes?
, • A) There are more afferent vessels than efferent vessels.
• B) Lymph nodes filter lymph and trap pathogens.
• C) Lymph nodes produce lymph.
• D) Lymph nodes contain lymphocytes.
Answer: C) Lymph nodes produce lymph
Rationale: Lymph nodes filter lymph but do not produce it. Lymph originates from
interstitial fluid .
6. Which 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.
Answer: A) 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 .
7. Blood enters the spleen via the:
• A) Splenic vein
• B) Hepatic artery
• C) Splenic artery
• D) Renal artery
Answer: C) Splenic artery
Rationale: The splenic artery supplies oxygenated blood to the spleen .
, 8. Blood leaving the spleen flows into this vessel which also carries blood
drained from the intestines, stomach, and pancreas:
• A) Inferior vena cava
• B) Hepatic portal vein
• C) Aorta
• D) Superior vena cava
Answer: B) Hepatic portal vein
Rationale: The splenic vein drains blood from the spleen and joins with veins from
the intestines, stomach, and pancreas to form the hepatic portal vein, which
carries blood to the liver .
9. The tonsils contain channels called ___ which trap bacteria:
• A) Sinuses
• B) Crypts
• C) Follicles
• D) Villi
Answer: B) Crypts
Rationale: Tonsillar crypts are invaginations that trap bacteria and particulates to
facilitate immune responses .
10. Which of the following people would you expect to have the largest thymus
gland?
• A) 60-year-old adult
• B) 30-year-old adult
