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Immunology & Serology > Lymphoid System > Flashcards

Lymphoid System Flashcards

1
Q

Where is the thymus located?

A
  • chest cavity/thorax
  • below thyroid gland
  • overlying the heart
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2
Q

Where is the spleen located?

A
  • upper-left quadrant of abdomen
  • below diaphragm
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3
Q

where cells develop

A

primary lymphoid organs

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4
Q

Large lymphoid organ surrounded by connective tissues

A

spleen

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5
Q

Comprises immune cells located below the skin

A

cutaneous immune system

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6
Q

consist of diffusely distributed lymphoid cells and follicles that underlie all regions coated with mucosa

A

Mucosa-Associated Lymphoid Tissue

(MALT)

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7
Q

Small encapsulated structures located at the junction of the main lymphatic tracts

A

lymph nodes

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8
Q

Give the 4 secondary lymphoid organs

A
  1. spleen
  2. lymph nodes
  3. mucosa-associated lymphoid tissue (MALT)
  4. cutaneous immune system
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9
Q

Filters out worn-out RBCs, microorganisms, RBC antigens

A

red pulp

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10
Q

Lymphocytes spend about _____ in the blood before
they proceed to their specific secondary lymphoid organs

A

30 minutes

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11
Q

Special T-cells and APC located in the epidermis

A

cells of Langerhans

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12
Q

Give the 3 lymph nodes’ divisions

A
  1. cortex
  2. paracortex
  3. medulla
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13
Q

Give the spleen’s division with percentages

A
  • red pulp (80%)
  • white pulp (20%)
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14
Q

Contains antigen-presenting cells (APC)

(dendritic cells, macrophages)

A

white pulp

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15
Q

weighs 1300-1500 g

A

bone marrow

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16
Q

Main source of hematopoietic stem cells

A

bone marrow

17
Q

Increases in size until it reaches peak development during adolescence and gradually atrophies

A

thymus

18
Q

storage of cells

A

secondary lymphoid organs

19
Q

largest tissue of the body

A

bone marrow

20
Q
  • cascade
  • lymphocytes go to specific secondary lymphoid tissues
A

lymphocyte homing

21
Q

Continuous flow of lymphocytes going to the blood and to the lymphatic system and back into the blood

A

lymphocyte recirculation

22
Q

Lymphocytes have receptors that are specific to ligands found in the tissues

A

lymphocyte homing

23
Q

Give the 2 primary lymphoid organs

A
  1. thymus
  2. bone marrow

Immunology & Serology (7 decks)

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