Ch 9

Question 1

Pathogens living organisms

Answer 1

bacteria
fungi
parasites

Question 2

Pathogens nonliving infectious:

Answer 2

viruses
prions

Question 3

Bacteria is usually treated with ____

Answer 3

Antibiotics

Question 4

-Much smaller than bacteria
-Unable to reproduce outside of a host cell
-Contains DNA or RNA ( Not both)

Answer 4

Viruses

Question 5

Diseases caused by viruses:

Answer 5

Aids, hepatitis, rabies, common cold, chicken pox

Question 6

Factors for Human Health Risks from Pathogens

Answer 6

-Transmissibility: How readily its passed from person to person
(high transmissibility = spreads readily)

-Mode of transmission:
how it is passed to people (Ex: body fluids)

-Virulence:
how much damage is caused by the infection; (highly virulent = serious illness)

Question 7

Lymphatic system functions include:

Answer 7

filtering foreign material through lymph nodes to defend against infection

Question 8

largest lymphatic organ

Answer 8

Spleen

Question 9

What are the 2 regions in the Spleen?

Answer 9

Red pulp: Removes old and damaged red blood cells

White Pulp: has lymphocytes searching and destroying pathogens

Question 10

Located behind Sternum, above heard

Answer 10

Thymus Gland

Question 11

Filters pathogens from food and air entering the throat

Answer 11

Tonsils

Question 12

Filter pathogens from air; found in back of nasal passages

Answer 12

Adenoids

Question 13

Physical or chemical barriers that block entry (First line of defense)

Answer 13

-Skin
-Tears and saliva
-Mucus
-Stomach

Question 14

Nonspecific defenses (2nd line of defense)

Answer 14

-Phagocytosis: white blood cells surrounding invading bacteria

-Inflammation: Pain, heat, swelling, redness.

-Fever Response: causes bacterial reproduction

Question 15

Characteristics of Immune response (3rd line of defense)

Answer 15

-recognizes and targets specific pathogens and foreign substances

-has memory

-remembers initial exposure