Lymphocyte Development and Immune Response Quiz

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What distinguishes a naïve lymphocyte from an activated lymphocyte?

Naïve lymphocytes have lower numbers in the blood and lymph.

Naïve lymphocytes have not encountered an antigen yet. (correct)

Naïve lymphocytes have fewer lymphoid follicles.

Naïve lymphocytes are found in the primary lymphoid organs only.

Where do lymphocytes primarily concentrate, apart from circulating in the blood and lymph?

In primary lymphoid organs

In the liver

In the lungs

In secondary lymphoid organs (correct)

What is the function of germinal centers in the secondary lymphoid organs?

Sites of rapidly dividing and differentiating B lymphocytes (correct)

Removal of pathogens from blood

Transportation of lymphocytes to primary lymphoid organs

Filters of the lymph

What distinguishes high endothelial venules in secondary lymphoid organs?

Thicker and more columnar lining cells than normal endothelial cells (C) Signup and view all the answers

Why are lymph nodes sometimes referred to as the 'filters of the lymph'?

Because they remove debris and pathogens from the lymph (B) Signup and view all the answers

How do bacteria that infect interstitial fluid reach regional lymph nodes?

Taken up by the lymphatic capillaries (A) Signup and view all the answers

What is the primary function of tonsils based on the text?

Helping children develop immunity to common environmental pathogens (D) Signup and view all the answers

Why are tonsils often removed in children with recurring throat infections?

When the swelling interferes with breathing and/or swallowing (A) Signup and view all the answers

Where is Mucosa-associated lymphoid tissue (MALT) found?

Underlying the mucosa of various body parts like the gastrointestinal tract (A) Signup and view all the answers

What distinguishes Peyer’s patches within the small intestine?

They contain specialized cells called M cells that sample material and induce immune responses (A) Signup and view all the answers

What can a blockage of the lumen in MALT trigger?

An inflammatory response leading to appendicitis (B) Signup and view all the answers

What is the role of specialized endothelial cells known as M cells present in Peyer’s patches?

Sampling material from the intestinal lumen for immune responses (D) Signup and view all the answers

What is the primary function of the spleen?

Filtering blood and mounting immune responses to blood-borne pathogens (A) Signup and view all the answers

Which cells are present in the subcapsular sinus of the lymph node as lymph enters?

Dendritic cells, macrophages, and reticular fibers (A) Signup and view all the answers

What surrounds the germinal centers of rapidly dividing B cells in lymphoid follicles?

T cells (C) Signup and view all the answers

What is the term used for lymph exiting the lymph node via specific vessels?

Efferent lymphatic vessels (D) Signup and view all the answers

What is the function of the red pulp in the spleen?

Filtration system of the blood using cells of the immune response (D) Signup and view all the answers

Where are lymphoid nodules primarily located in the body?

In the digestive and respiratory tracts (A) Signup and view all the answers

What is the role of tonsils in developing immunity?

Developing immunity to oral pathogens (A) Signup and view all the answers