first line of defense

Question 1

define innate immunity

Answer 1

inborn, natural, body components that block, destroy and or remove microbes

Question 2

how does the mucociliary escalator protect the lungs

Answer 2

mucus traps unwanted particles and wave like motion of cilia expell microbes

Question 3

eg of chemical barriers

Answer 3

stomach acid- low pH hostile environment for many enzymes

Question 4

fn of lysozyme

Answer 4

breaks open bacterial cell wall causing lysis

Question 5

where is lysozyme found

Answer 5

bllody fluids like tears, saliva and breastmilk

Question 6

eg of genetic barrier

Answer 6

sickle cell anemia protects against malaria (RBC have abnormal hemoglobin- Plasmodium parasite cannot multiply)

Question 7

how can some be naturally immune to HIV

Answer 7

lack coreceptors on CD4/T helper lymphocytes. requires binding to receptors in order to enter host cell

Question 8

what are co receptors

Answer 8

kind of receptor for chemokine