Mastering A&P Lymphatic & Immune – HW Questions and Answers

Which of the following are primary lymphoid organs?

bone marrow and thymus
appendix and spleen
lymph nodes and tonsils
spleen and thymus

Which of the following areas in a secondary lymphoid organ allows intimate contact between blood and the lymphocytes?

red pulp of the spleen
germinal centers of the lymph nodes
Hassall’s corpuscles of the thymus
white pulp of the spleen

Where in the lymph node do the T cells first encounter antigens presented by dendritic cells?

medullary cords in the medulla
lymphoid follicles of the outer cortex
germinal centers of the cortex
deep in the cortex

Collections of lymphoid tissues, called MALT, are strategically placed throughout the respiratory, digestive, and genitourinary systems. Which one of these is located at the end of the small intestine?

appendix
Peyer’s patches
tonsils

There is a decrease in our ability to fight infection as we age. Which lymphoid organ may have a role in this decline?

thymus
spleen
lymph nodes

What is the function of the mini-valves in lymph capillaries?

A) increase permeability
B) enforce a one way flow from lymphatic system into capillary bed
C) connect to blood capillaries
D) reduce pressure in the lymphatic capillary

Once collected, lymph ultimately drains into __________.

the liver for detoxification
lymph nodes
arterial circulation
venous circulation

Which of these lymphoid organs is part of a collection of tissues called the mucosa-associated lymphoid tissues (MALT) and removes pathogens entering the pharynx (throat)?

Which lymphoid organ is primarily active during the early years of life?

Which part of the spleen is the site of immune function?

splenic sinusoids
red pulp
splenic cords
white pulp

Which lymphoid organ(s) serve(s) as the site where B lymphocytes become immunocompetent B cells?

thyroid gland
tonsils
red bone marrow
thymus gland

After surgical removal of the spleen (i.e., a splenectomy), some other organs take over most of its functions. Which of the following spleen functions in the adult can not be performed by bone marrow?

A) immune surveillance
B) erythropoiesis
C) removal of aged and damaged red blood cells from the blood
D) storage of platelets

Which of the following is a role of lymph nodes?

They filter lymph.
They return lymph to circulation.
They produce red blood cells.
They produce lymph.

Lymphedema may be treated by all EXCEPT which of the following?

A) manual compression of the affected area
B) movements of the affected area
C) treatments that promote growth of lymphatic vessels
D) bed rest to allow enhanced blood flow and therefore healing of the affected area

Which of the following promotes closure of the minivalves associated with lymph capillaries?

A) anchoring of endothelial cells to adjacent structures by collagen fibers
B) inflammation of tissues surrounding lymphatic capillaries
C) increasing pressure in the interstitial space
D) increasing pressure inside the lymph capillary

Within buboes, bacteria are directly attacked by ______.

dendritic cells
B cells
macrophages
None of the listed responses is correct.

Which lymphoid organ(s) serve(s) in immune surveillance and blood cell recycling?

the lymph nodes
the thymus
the tonsils
the spleen

Select the correct statement about lymphoid tissue.

A) Lymphoid tissue is predominantly reticular connective tissue.
B) T lymphocytes act by ingesting foreign substances.
C) Lymphoid macrophages secrete antibodies into the blood.
D) Once a lymphocyte enters the lymphoid tissue, it resides there permanently.

Lymph from the right leg ultimately is delivered to which duct in the thoracic region?

Lymphatic vessels

Which of the following are primary lymphoid organs?

Which of the following areas in a secondary lymphoid organ allows intimate contact between blood and the lymphocytes?

Where in the lymph node do the T cells first encounter antigens presented by dendritic cells?

Collections of lymphoid tissues, called MALT, are strategically placed throughout the respiratory, digestive, and genitourinary systems. Which one of these is located at the end of the small intestine?

There is a decrease in our ability to fight infection as we age. Which lymphoid organ may have a role in this decline?

What is the role of the B lymphocytes (B cells) in lymphoid tissue?

What is the role of dendritic cells in lymphoid tissue?

What constitutes the body’s first line of defense against disease?

Which of the following is NOT a characteristic of Natural Killer (NK) cells?

Which of the following innate internal defenses work by interfering with viral replication?

How do phagocytes recognize foreign cells or bacteria?

Which of the innate defense mechanisms can lyse bacteria and mark cells for phagocytosis?

Which of the following can act as opsonins on bacteria, thus enhancing phagocytosis?

With what does our immune system coat pathogens to facilitate their capture and accelerate phagocytosis?

Four (or five) cardinal signs indicate inflammation. What specific sign of inflammation is the result of exudate in the tissue spaces?

What is the main event of chemotaxis?

How do interferons protect against infection in healthy cells?

Which of the following statements regarding NK cells is a false or incorrect statement?

Which of the following cells predominate at the sites of chronic infections?

Cancer cells and virus-infected body cells can be killed before activation of adaptive immunity by__________.

Complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phagocytize the organism. The phenomenon is termed _______.