HISTOLOGY (Lymphoid System)

Question 1

is a complex network of ducts, nodes and
other organs that are located throughout the
body.

Answer 1

LYMPHOID SYSTEM

Question 2

Cannot normally be penetrated by bacteria and viruses

Answer 2

skin

Question 3

Line digestive, respiratory, and genitourinary tracts

Answer 3

Mucus Membranes (mucosae)

Question 4

two other defense system

Answer 4

inflammatory response, immune response

Question 5

the first phagocytes to arrive

Answer 5

neutrophils

Question 6

is a collection of more than 20 plasma proteins that produced by the liver.

Answer 6

COMPLEMENT SYSTEM

Question 7

any substance that the immune system perceives as
foreign to the body and which, consequently,
induces an immune response

Answer 7

antigen

Question 8

principal effector cells of the immune response

Answer 8

lymphocytes

Question 9

Substances that are synthesized by plasma cells

Answer 9

antibodies

Question 10

Immunity mediated by antibodies

Answer 10

HUMORAL IMMUNITY

Question 11

Immunity not mediated by antibodies

Answer 11

CELL-MEDIATED IMMUNITY

Question 12

Its target includes virus-infected cells, cells with intracellular
bacteria and cancer cells

Answer 12

cytotoxic t-cells

Question 13

A form of cell death in which a programmed
sequence of events leads to the elimination of cells
without releasing harmful substances into the
surrounding area.

Answer 13

apoptosis

Question 14

Normally digest many pathogens with their lysozomal enzymes without help from Th cells

Answer 14

macrophages

Question 15

This process is generally minor reaction that has a long induction phase
(several days).

Answer 15

primary immune system

Question 16

elicited by re-exposure to an
antigen that has previously triggered a primary immune response

Answer 16

SECONDARY IMMUNE SYSTEM

Question 17

• The immune response is vital to survival, but it sometimes go awry.

Answer 17

ABNORMAL IMMUNE RESPONSE

Question 18

The thymus and the bone marrow constitute
the primary lymphoid tissues involved in the
production and early selection of lymphocytes.

Answer 18

central lymphoid organs

Question 19

Provides the environment for the foreign or
altered native molecules (antigens) to
interact with the lymphocytes.

Answer 19

peripheral lymphoid organs

Question 20

• Consists of a connective tissue framework (stroma) and
  the functional cellular elements that it supports
  (parenchyma).

Answer 20

LYMPHOID TISSUE

Question 21

The lymphocytes are relatively few and far apart

Answer 21

LOOSE LYMPHOID TISSUE

Question 22

diffuse
lymphoid tissue where the lymphocytes are
numerous and close to each other

Answer 22

DENSE LYMPHOID TISSUE.

Question 23

Central Lymphoid tissue

Answer 23

thymus

Question 24

divide the lobes into lobules of unequal
sizes.

Answer 24

CONNECTIVE TISSUE TRABECULAE

Question 25

darker than medulla

Answer 25

PERIPHERAL DARKER STAINING REGION(CORTEX)

Question 26

promotes proliferation and differentiation of lymphocytes.

Answer 26

nurse cells

Question 27

fewer lymphocytes and macrophages

Answer 27

CENTRAL LIGHTER STAINING REGION(MEDULLA)

Question 28

composed of hyaline material that is surrounded by layers of flattened epitheloid cells.

Answer 28

THYMIC CORPLUSCLES(

Question 29

A bean-shaped organ that is an encapsulated collection of lymphoid tissue.

Answer 29

lymph node

Question 30

* Lymphoid nodule * Embedded in dense lymphoid tissue

Answer 30

outer cortex

Question 31

* no lymph nodules * consist of simply of dense lymphoid tissue

Answer 31

inner cortex

Question 32

are called follicular dendritic cells

Answer 32

B-cell rich areas

Question 33

are called interdigitating dendritic cell

Answer 33

Outer T cell-rich areas

Question 34

ramify and give rise to smaller branch that enter the node on its convex surface

Answer 34

AFFERENT LYMPHATIC VESSELS

Question 35

empties into trabecular sinuses that travel inward along the trabeculae.

Answer 35

SUBCAPSULAR SINUS

Question 36

unite as they approach the hilus to form several efferent lymphatic vessels.

Answer 36

MEDULLARY SINUSES

Question 37

are fewer bigger than the afferent lymphatic vessels.

Answer 37

EFFERENT LYMPHATIC VESSELS

Question 38

are irregular spaces whose walls permit all the constituents of lymph to pass freely.

Answer 38

THE SINUSES

Question 39

filters blood

Answer 39

spleen

Question 40

Consists of lymphoid nodules embedded in dense lymphoid tissue

Answer 40

white pulp

Question 41

Consists of numerous large, blood-filled sinusoids (splenic sinusoids)

Answer 41

red pulp

Question 42

* Refers to the enormous amount of lymphoid tissue that exist in the mucosa and submucosa of gastrointestinal, respiratory, and genitourinary tract.

Answer 42

Mucosa-Associated Lymphoid Tissue (MALT)

Question 43

* Lymphoid follicles located in the wall of the small intestine and appear as oval or round lymphoid follicles.

Answer 43

PEYER’S PATCHES

Question 44

consist of a pair of palatine tonsils, several lingual tonsils, a single pharyngeal tonsil and a pair of tubal tonsils

Answer 44

WALDEYER’S RING

Question 45

located in the lateral aspects, one on its side, of the oropharynx.

Answer 45

PALATINE TONSILS

Question 46

Consist of several discrete masses located in the dorsum of the posterior tongue

Answer 46

LINGUAL TONSILS

Question 47

Occupies the central area of the posterior and superior walls of the nasopharynx.

Answer 47

PHARYNGEAL TONSIL

Question 48

Located in the nasopharynx near the openings of the Eustachian tubes.

Answer 48

TUBAL TONSIL