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Anatomy & Physiology 2 > Lecture 5: Lymphatic System > Flashcards

Lecture 5: Lymphatic System Flashcards

1
Q

How do capillaries filter fluid from the blood?

A
  • hydrostatic pressure from the heart
  • osmotic pressure from ihgh conc. of proteins in blood
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2
Q

Edema stems from what?

A

build-up of lymph

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3
Q

What is associated with an increase in edema?

A
  • reduced physical activity
  • low blood pressure
  • damage to valves in lymohatic vessels
  • cutting through lymphatic vessels during surgery
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4
Q

What are the 2 regions of lymph nodes?

A
  • sinuses containing macrophages & dendritic cells
  • inner medula with plasma, T, & B cells
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5
Q

What are the functions of lymph nodes?

A
  • monitor/ filter harmful particles from lymph
  • major site of lymphocyte production
  • lymphocytes attack bacteria, parasites, & viruses
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6
Q

What are the 2 lymphatic ducts?

A
  1. thoracic duct -> collects lymph from most of the body
  2. right lymphatic duct -> collects from right upper side
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7
Q

All blood cells form where?

A

bone marrow

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8
Q

What are thymocytes?

A

cells that travel from the bone marrow to thymus then mature into T cells

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9
Q

Where do thymocytes mature?

A

in the cortex

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10
Q

What are the 2 regions of the thymus?

A

outer cortex & inner medulla

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11
Q

What cells are in the outer cortex of the thymus?

A
  • epithelial
  • macrophages
  • dendritic
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12
Q

What are MHC proteins?

A

specialized surface proteins used to present antigens

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13
Q

What is positive selection in the lymphatic system?

A

whether or not a thymocyte can bind to MHCs (no= apoptosis; yes= move on to medulla) (want yes)

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14
Q

What receptors help to distinguish T cells?

A

CD4 & CD8

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15
Q

What is negative selection in the lymphatic system?

A

whether cells can bind to antigens (want to be no)

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16
Q

What are CD 4 T cells?

A

helper T cells thatactivate required immune response

17
Q

What are CD8 T cells?

A
  • cytotoxic T cells that destroy foreign invaders & infected cells
  • induce apoptosis
18
Q

What part of the lymphatic system promote infection by pathogens?

19
Q

What organ acts as a lymph node for the blood?

20
Q

What organ promotes pathogen access in order to destroy them and teach their identity to lymphocytes?

21
Q

Why do lymphs move into lymphatic capillaries?

A

osmotic pressure in the tissue

Anatomy & Physiology 2 (12 decks)

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