Immune and Lymphoid

Question 1

Immunocompetent cell

Answer 1

Cell that is able to recognize antigens and act against them

Question 2

Immune response

Answer 2

How the body recognizes and defends against foreign substances and pathogens

Question 3

Humoral immunity

Answer 3

Acquired immunity in which antibodies are secreted in response to antigenic stimulation.

Question 4

cellular immunity

Answer 4

Immunological defense provided by T cells that come into close contact with their victim cells

Question 5

Plasma cells

Answer 5

Cells derived from B lymphocytes that produce and secrete large amounts of antibodies. Responsible for humoral immunity

Question 6

Memory cells

Answer 6

Cells derived from B or T cells that can quickly recognize a foreign antigen to which the body has been previously exposed.

Question 7

Antigen-presenting cell (APC)

Answer 7

Immunocompetent cell that mediates the cellular immune response by processing and presenting antigens to T cells.

Question 8

Waldeyer’s Ring

Answer 8

Pharyngeal, palatine and lingual tonsils which form a circle at entrance of gut and airway. Strategic, primary defense of lymphoid tissue

Question 9

Peyers patches

Answer 9

Group of lymphoid nodules in the mucosa of the ileum that respond to foreign antigens.

Question 10

Immunoglobulin/Antibody

Answer 10

Protein produced by B cells in response to unique antigen.

Question 11

Antigen

Answer 11

Any substance that causes the immune system to produce antibodies against it.

Question 12

Innate (natural) immunity

Answer 12

Most primitive an fast. Little specificity (programmed in germ line DNA). Results in direct killing of pathogens via macrophages, neutrophils, eosinophils and NK. Dysfunctional activation can lead to autoimmune dieases.

Question 13

Adaptive immunity

Answer 13

Antigen specific immune response.

Question 14

Immunodeficiency

Answer 14

Decreased or compromised ability to respond to antigenic stimuli with an appropriate immune response.

Question 15

Follicular Cortex of lymph node

Answer 15

• Rich capillary network

- B-cell zone

Question 16

Parafollicular cortex of lymph node

Answer 16

• Deep cortex
• Rich capillary network
• T-cell zone

Question 17

Medulla of lymph node

Answer 17

• Rich with cells (macrophages, dendritic, pasta and B).
• Highly branched network of thin reticular fibers provide physical support and network for mov’t of lymphocytes and dendritic cells

Question 18

Cortical sinuses

Answer 18

• Receive fluid from afferent vessels.
• Composed of trabecular, cortical and intermediate sinuses.
• Contains macrophages and dendritic cells to perform phagocytosis.

Question 19

Medullary sinuses

Answer 19

• Collect lymph after filtration in cortez

- Contains macrophages and antibodies

Question 20

Medullary cords

Answer 20

Contains the plasma cells that secrete antibodies into sinuses

Question 21

Red pulp

Answer 21

More abundant, main filtration functions.

Question 22

White pulp

Answer 22

Lymphatic nodules and diffuse lymph tissue. Synthesizes antibodies.

Question 23

Splenic Cords

Answer 23

Found in red pulp between sinusoids. Hold monocytes.

Question 24

Splenic Sinusoids

Answer 24

Endothelial cells arranged loosely in tubular form. Blood moves easily in and out as discontinuous.

Question 25

Thymus

Answer 25

• Production of T lymphocytes

- Hormone secretion

Question 26

Thymus outer cortex

Answer 26

Full of developing thymocytes and macrophages

Question 27

Thymus medulla

Answer 27

Full of T cells

Question 28

Hassal’s corpuscles

Answer 28

Concentric, flattened epithelial reticular cells