AP Biology Immune System Review

Saliva, tears, and sweat contain which enzyme?

• lysozyme

• protein kinase

• hydrochloric acid

• lactase

Histamines directly cause:

• Helper T cells to mark pathogens for destruction

• Cytotoxic T cells to become activated

• B and T cells to create memory cells

• Blood vessels to dilate and leak fluid and WBC's

Interferon is a chemical messenger sent from a virus infected cell. What is its function?

• Causes neighboring cells to make proteins to block viral reproduction

• Calls white blood cells over to take care of the infection

• Causes neighboring cells to build up thicker cell membranes so the viruses can't enter

Which of the following are considered "Professional Antigen Presenting Cells"?

• B Cells

• Macrophage

• Dendritic Cells

• T Cells

Which of the following cells have MHC Class II proteins on their surface?

• All nucleated cells

• Only APC's (Antigen Presenting Cells)

Means: "programmed cell death"

• Natural Killer Cell

• Mitosis

• Apoptosis

• CD4 and CD8

Natural Killer (NK) Cells target:

• Cancerous cells

• Virus invaded cells

• A specific antigen marker on some type of pathogen

Natural Killer cells cause which of the following?

• Release of cytokines which alert other immune cells

• Punch holes in a cell infected with viruses

• Release an enzyme into an infected cell which switches on apoptosis

• Cytotoxic T cells to shoot everything in site with perforin

Helper T Cells have a special protein on their surface called:

• CD4

• CD8

CD8 proteins are found on which of the following cell types?

• B Cells

• Macrophages

• Cytotoxic T Cells

• Natural Killer Cells