,BIOD 152 A&P 2 Module 4 | Actual study Questions and Answers | 2026/27
Updates | NEWEST VERSION
1. Which of the following is the primary function of the lymphatic system? (Select all that apply)
A) Returns fluid to the bloodstream
B) Absorbs fat molecules
C) Defends the body against disease
D) Produces red blood cells
Correct Answer: Returns fluid to the bloodstream, Absorbs fat molecules, Defends the body
against disease
Rationale: The lymphatic system returns excess tissue fluid to the bloodstream, absorbs dietary
fats through specialized lacteals, and defends the body against disease-causing agents . It does
not produce red blood cells; that is a function of red bone marrow.
2. Lymphatic vessels are most similar in structure to which cardiovascular vessels?
A) Arteries
B) Veins
C) Capillaries
D) Venules
Correct Answer: Veins
Rationale: Lymphatic vessels have walls similar to veins and contain valves that prevent the
backflow of lymph . They are thin-walled and operate under low pressure, like veins.
,3. Which structure drains lymph from the right upper extremity and the right side of the head
and neck?
A) Thoracic duct
B) Right lymphatic duct
C) Cisterna chyli
D) Left lymphatic duct
Correct Answer: Right lymphatic duct
Rationale: The right lymphatic duct drains lymph from the right upper quadrant of the body,
including the right arm, right side of the head and neck, and right thorax . It drains
approximately 25% of total body lymph.
4. Which lymphatic duct drains the remaining three-quarters of the body's lymph?
A) Right lymphatic duct
B) Thoracic duct
C) Lumbar trunk
D) Jugular trunk
Correct Answer: Thoracic duct
Rationale: The thoracic duct (left lymphatic duct) drains lymph from the left side of the head,
neck, and chest, the left upper limb, and the entire lower half of the body . It is the largest
lymphatic vessel and drains approximately 75% of the body's lymph.
5. A patient presents with red streaks under the skin on the arm, fever, and chills following a
minor cut. What is the most likely diagnosis?
A) Lymphoma
, B) Lymphadenitis
C) Lymphangitis
D) Edema
Correct Answer: Lymphangitis
Rationale: Lymphangitis is an infection or inflammation of a lymphatic vessel, often appearing as
red streaks under the skin . This is a typical presentation following a break in the skin.
6. What is lymphadenitis?
A) Cancer of lymphoid tissue
B) Swelling of lymph nodes due to infection
C) Swelling due to excess interstitial fluid
D) Infection of a lymphatic vessel
Correct Answer: Swelling of lymph nodes due to infection
Rationale: Lymphadenitis is the swelling or inflammation of lymph nodes due to infection,
indicating an active immune response . It is different from lymphoma (cancer of lymphoid
tissue).
7. Which condition is defined as the accumulation of excess interstitial fluid leading to tissue
swelling?
A) Lymphoma
B) Lymphadenitis
C) Lymphangitis
D) Edema
Updates | NEWEST VERSION
1. Which of the following is the primary function of the lymphatic system? (Select all that apply)
A) Returns fluid to the bloodstream
B) Absorbs fat molecules
C) Defends the body against disease
D) Produces red blood cells
Correct Answer: Returns fluid to the bloodstream, Absorbs fat molecules, Defends the body
against disease
Rationale: The lymphatic system returns excess tissue fluid to the bloodstream, absorbs dietary
fats through specialized lacteals, and defends the body against disease-causing agents . It does
not produce red blood cells; that is a function of red bone marrow.
2. Lymphatic vessels are most similar in structure to which cardiovascular vessels?
A) Arteries
B) Veins
C) Capillaries
D) Venules
Correct Answer: Veins
Rationale: Lymphatic vessels have walls similar to veins and contain valves that prevent the
backflow of lymph . They are thin-walled and operate under low pressure, like veins.
,3. Which structure drains lymph from the right upper extremity and the right side of the head
and neck?
A) Thoracic duct
B) Right lymphatic duct
C) Cisterna chyli
D) Left lymphatic duct
Correct Answer: Right lymphatic duct
Rationale: The right lymphatic duct drains lymph from the right upper quadrant of the body,
including the right arm, right side of the head and neck, and right thorax . It drains
approximately 25% of total body lymph.
4. Which lymphatic duct drains the remaining three-quarters of the body's lymph?
A) Right lymphatic duct
B) Thoracic duct
C) Lumbar trunk
D) Jugular trunk
Correct Answer: Thoracic duct
Rationale: The thoracic duct (left lymphatic duct) drains lymph from the left side of the head,
neck, and chest, the left upper limb, and the entire lower half of the body . It is the largest
lymphatic vessel and drains approximately 75% of the body's lymph.
5. A patient presents with red streaks under the skin on the arm, fever, and chills following a
minor cut. What is the most likely diagnosis?
A) Lymphoma
, B) Lymphadenitis
C) Lymphangitis
D) Edema
Correct Answer: Lymphangitis
Rationale: Lymphangitis is an infection or inflammation of a lymphatic vessel, often appearing as
red streaks under the skin . This is a typical presentation following a break in the skin.
6. What is lymphadenitis?
A) Cancer of lymphoid tissue
B) Swelling of lymph nodes due to infection
C) Swelling due to excess interstitial fluid
D) Infection of a lymphatic vessel
Correct Answer: Swelling of lymph nodes due to infection
Rationale: Lymphadenitis is the swelling or inflammation of lymph nodes due to infection,
indicating an active immune response . It is different from lymphoma (cancer of lymphoid
tissue).
7. Which condition is defined as the accumulation of excess interstitial fluid leading to tissue
swelling?
A) Lymphoma
B) Lymphadenitis
C) Lymphangitis
D) Edema
