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CP virus & immunity
virus and immunity
Question | Answer |
---|---|
Antibiotics | are used to clear up bacterial infections. |
virus | nonliving because it cannot reproduce on its own |
general structure | outer protein coat and RNA or DNA |
lytic cycle | after entering the host cell, the virus hijacks the DNA, replicates, bursts and releases new viruses. |
Lysogenic Cycle | after entering the host cell, the virus is integrated into th host cell and ruptures after several generations. |
Varicella | virus that causes chicken pox/shingles |
Herpes Simplex I | virus that causes cold sores |
first line of defense | skin and mucus |
2nd line of defense | release of chemicals from cells |
Helper T cells | “activate” white blood cells called B cells |
B cells | can create memory cells that stay in the body in case another infection arises |
what if a cell is already infected? | Helper T cells alert Killer T cells and poke holes in the infected cell to kill it |
active immunity | comes from exposure to a disease; longer lasting |
passive immunity | comes from mother to baby; not permanent |