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Health Science > Lecture 9 Immune System > Flashcards

Lecture 9 Immune System Flashcards

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Biology 101 flashcards
1
Q

What’s immune system?

A

Body’s defense against diseases

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2
Q

Viruses

A

Non-living particles that contains genetic materials

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3
Q

Bacteria

A

Living organisms that have a metabolism

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4
Q

What are 3 lines of defense?

A

Nonspecific External Barriers

innate Immune System

Acquired Immune System

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5
Q

Role of Non-Specific External Defenses

A

Prevent viruses and bacteria from entering the body

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6
Q

NSED lines of defense example

A

Skin

Saliva

Cough reflex

Stomach Acid

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7
Q

What’s Innate Immune System?

A

Cells and mechanisms that defend host from infection

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8
Q

What’s Phagocytes?

A

Several types of white blood cells

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9
Q

Are white blood cells natural killer cells?

A

Yes

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10
Q

Is a fever a defense mechanism?

A

Yes

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11
Q

Purpose of Acquired Immune System

A

Gives immunity to certain diseases

Forms “memory” of the invading microbe

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12
Q

Pathogen (Antigen)

A

Substance that causes an immune system to produce antibodies

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13
Q

Antibody

A

Protein produced by immune system; tag destroys invasive microbes

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14
Q

What’s immunity?

A

Resistance to diseases

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15
Q

What are lymphocytes?

A

White blood cells that circulate in the bloodstream

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16
Q

Helper T Cells

A

Detects invading pathogen and trigger killer T cells

17
Q

Killer T Cells

A

Attack and kill invading pathogen and infections

18
Q

Suppressor T Cells

A

Slows down immune response when threat is eliminated

19
Q

How do Killer T Cells recognize invading pathogen?

A

B Cells

20
Q

What are antibodies?

A

Proteins that bind to specific pathogen

21
Q

What cells become memory cells?

A

B and T cells

22
Q

How are vaccines created?

A

Through weakened/dead viruses or bacteria

23
Q

How do vaccines work?

A

Reduces risk of infections by working with body’s defenses

Health Science (19 decks)

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