L1 Ecology

Question 1

Planktonic

Answer 1

Floating in water

Question 2

Sessile

Answer 2

Attached to surface in biofilms

Question 3

Growth rate of biofilms

Answer 3

Slow growing

Question 4

Primary mechanisms for biofillm resistance

Answer 4

Slowing diffusion
Persister cells that are inactive
Proximity and exchange of genes

Question 5

Salivary binding inhibiting mechanisms (4)

Answer 5

Antibodies
Agglutinins
Proline rich glycoproteins
Alpha-amylase

Question 6

Mechanisms of Oxygen toxicity

Answer 6

Oxidation of membrane lipids

Oxidation of sulfhydryl group causing cross linking

Question 7

Enzymes that protect against Oxygen

Answer 7

Superoxide dismutase
Catalase
Peroxidase

Question 8

Type of bacteria that scavanges O2 to provide anaerobic environment

Answer 8

Fusobacterium

Question 9

Specific immunity antibodies

Answer 9

SIgA: In saliva, prevents adhesion
IgG: in GCF, directed against organisms in perio

Question 10

Main type of leukocyte in GCF

Answer 10

Neutrophils

Question 11

Major salivary proteins

Answer 11

Alpha amylsase

Mucins

Question 12

Salivary lysozyme

Answer 12

Digest peptidoglycan in bacterial cell wall

Question 13

Salivary lactoferrin and serum transferrin

Answer 13

Bind iron so that it is not available to bacteria

Question 14

Sialoperoxidase

Answer 14

Generate superoxide radicals

Question 15

Proline rich proteins and statherine modulate..

Answer 15

Phosphate and calcium chemistry

Question 16

Vitamin K3 is synthesize by _____ and used by ______

Answer 16

Veillonella parvula and used by Pg an Pi

Question 17

Each person harbors around _____ species

Answer 17

100-200 species