BIOL251/BIOD152 Module 4 Exam: Lymphatic System
& Immunity | 70+ Practice Questions & Answers
Complete Study Guide – Portage Learning | Latest
2026/2027 | 100% Verified
This comprehensive document contains 89 practice questions and verified answers for
the Module 4 Exam covering the Lymphatic System and Immunity for Portage Learning's
BIOL251 Human Anatomy & Physiology I w/Lab or BIOD152 Anatomy & Physiology II.
Questions are based on verified exam materials and textbook content .
,SECTION 1: LYMPHATIC SYSTEM STRUCTURE & FUNCTION (Questions 1–25)
1. What is the 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
Answer: A, B, C
The lymphatic system returns excess tissue fluid to the bloodstream, absorbs dietary fats
through specialized lacteals in the small intestine, and defends the body against disease-
causing agents .
2. Lymphatic vessels are most similar in structure to which cardiovascular vessels?
A) Arteries
B) Veins
C) Capillaries
D) Venules
Answer: B
Lymphatic vessels have walls similar to veins and possess valves that prevent the backflow
of lymph. They are thin-walled and operate under low pressure .
3. Which structure enters the subclavian vein?
A) Lymphatic duct
B) Lymphatic vessel
C) Lymphatic trunk
D) Lymphatic capillary
Answer: A
The right lymphatic duct and thoracic duct empty lymph into the subclavian veins, returning
lymph to the cardiovascular system .
, 4. What does red bone marrow produce?
A) Red blood cells only
B) White blood cells only
C) Red and white blood cells
D) Platelets only
Answer: C
Red bone marrow is the site of production of all blood cells, including red blood cells
(erythrocytes) and white blood cells (lymphocytes) .
5. Which cells produce antibodies?
A) T lymphocytes
B) Macrophages
C) B lymphocytes
D) Natural killer cells
Answer: C
B lymphocytes (B cells) are responsible for antibody production. When activated by an
antigen, B cells differentiate into plasma cells that produce antibodies specific to that
antigen .
6. The tonsils are composed of:
A) Peyer's patches
B) Lymphatic nodules
C) Stem cells
D) Red pulp
Answer: B
Tonsils are composed of lymphatic nodules—aggregations of lymphatic tissue that contain
densely packed B cells and macrophages .
7. Which cells are found in lymph nodes?
& Immunity | 70+ Practice Questions & Answers
Complete Study Guide – Portage Learning | Latest
2026/2027 | 100% Verified
This comprehensive document contains 89 practice questions and verified answers for
the Module 4 Exam covering the Lymphatic System and Immunity for Portage Learning's
BIOL251 Human Anatomy & Physiology I w/Lab or BIOD152 Anatomy & Physiology II.
Questions are based on verified exam materials and textbook content .
,SECTION 1: LYMPHATIC SYSTEM STRUCTURE & FUNCTION (Questions 1–25)
1. What is the 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
Answer: A, B, C
The lymphatic system returns excess tissue fluid to the bloodstream, absorbs dietary fats
through specialized lacteals in the small intestine, and defends the body against disease-
causing agents .
2. Lymphatic vessels are most similar in structure to which cardiovascular vessels?
A) Arteries
B) Veins
C) Capillaries
D) Venules
Answer: B
Lymphatic vessels have walls similar to veins and possess valves that prevent the backflow
of lymph. They are thin-walled and operate under low pressure .
3. Which structure enters the subclavian vein?
A) Lymphatic duct
B) Lymphatic vessel
C) Lymphatic trunk
D) Lymphatic capillary
Answer: A
The right lymphatic duct and thoracic duct empty lymph into the subclavian veins, returning
lymph to the cardiovascular system .
, 4. What does red bone marrow produce?
A) Red blood cells only
B) White blood cells only
C) Red and white blood cells
D) Platelets only
Answer: C
Red bone marrow is the site of production of all blood cells, including red blood cells
(erythrocytes) and white blood cells (lymphocytes) .
5. Which cells produce antibodies?
A) T lymphocytes
B) Macrophages
C) B lymphocytes
D) Natural killer cells
Answer: C
B lymphocytes (B cells) are responsible for antibody production. When activated by an
antigen, B cells differentiate into plasma cells that produce antibodies specific to that
antigen .
6. The tonsils are composed of:
A) Peyer's patches
B) Lymphatic nodules
C) Stem cells
D) Red pulp
Answer: B
Tonsils are composed of lymphatic nodules—aggregations of lymphatic tissue that contain
densely packed B cells and macrophages .
7. Which cells are found in lymph nodes?
