Defense	
  Against	
  Infec.ous	
  Disease	
  
Part	
  2	
  
IB	
  Bio	
  12	
  
Assessment	
  Statements	

Obj.	

6.3.1	

Define	
  pathogen.	
  	

1	

6.3.2	

Explain	
  why	
  an.bio.cs	
  are	
  effec....
3	
  Main	
  Lines	
  of	
  Defense	
  
1)  Physical	
  barriers	
  
–  Skin,	
  mucous	
  membranes	
  

2)  Non-­‐specifi...
An.bio.cs	
  are	
  ineffec.ve	
  
against	
  viruses!	
  	
Over-­‐use	
  of	
  an.bio.cs	
  is	
  accelera.ng	
  the	
  
e...
An.bio.cs	
  are	
  ineffec.ve	
  
against	
  viruses!	
  	
Analyse	
  the	
  graph	
  below.	
  Over	
  .me,	
  outline	
 ...
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)
Upcoming SlideShare
Loading in...5
×

CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)

342

Published on

Published in: Education, Technology
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
342
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
14
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

CAS IB Biology 6.3 Defense Against Infectious Disease (Part 2)

  1. 1. Defense  Against  Infec.ous  Disease   Part  2   IB  Bio  12  
  2. 2. Assessment  Statements Obj. 6.3.1 Define  pathogen.   1 6.3.2 Explain  why  an.bio.cs  are  effec.ve  against  bacteria  but  not  viruses.   3 6.3.3   Outline  the  role  of  skin  and  mucous  membranes  in  defense  against  pathogens.   2 6.3.4 Outline  how  phagocy.c  leucocytes  ingest  pathogens  in  the  blood  and  body  .ssues.   2 6.3.5 Dis6nguish  between  an#bodies  and  an#gens.   2 6.3.6 Explain  an.body  produc.on.   3 6.3.7 Outline  the  effects  of  HIV  on  the  immune  system.   2 6.3.8 Discuss  the  cause,  transmission  and  social  implica.ons  of  AIDS.   3 Command  terms:  hQp://i-­‐biology.net/ibdpbio/command-­‐terms/ Assessment  statements  from:  Online  IB  Biology  Subject  Guide
  3. 3. 3  Main  Lines  of  Defense   1)  Physical  barriers   –  Skin,  mucous  membranes   2)  Non-­‐specific  immune  system   –  Phagocy.c  leukocytes   3)  An6gen-­‐specific  immune  system   –  Lymphocytes  (e.g.  B-­‐cells,  T-­‐cells,  Killer  cells)  
  4. 4. An.bio.cs  are  ineffec.ve   against  viruses!   Over-­‐use  of  an.bio.cs  is  accelera.ng  the   evolu.on  of  more  harmful  bacteria.  We  are   running  out  of  an.bio.cs  that  work  and  are   selec.ng  for  diseases  such  as  MRSA.   h,p://www.youtube.com/watch?v=RedO6rLNQ2o An.bio.cs  are  designed  to  disrupt   structures  or  metabolic  pathways  in  bacteria   and  fungi:   •  cell  walls  and  membranes   •  DNA  synthesis  (replica.on)   •  RNA  polymerase   •  Transla.on     These  do  not  exist  or  are  very  different  in   viruses,  so  the  an.bio.c  will  have  no  effect.     Bacterial  drug  resisance,  from  Wiley  Essen#al  Biochemistry.  Find  out  more  here:   hQp://www.wiley.com/college/praQ/0471393878/student/ac.vi.es/bacterial_drug_resistance/index.html
  5. 5. An.bio.cs  are  ineffec.ve   against  viruses!   Analyse  the  graph  below.  Over  .me,  outline   what  has  happened  to:   •  The  number  of  new  approved  an.bio.cs   •  The  diversity  of  new  approved  an.bio.cs     Suggest  reasons  for  your  answers.  Use  the  graph  to   write  your  own  DBQ  prac.ce  ques.ons.     Chlamydia  trachoma#s  bacteria.  Are  you  ready  for  the   end  of  an.bio.cs?  Guardian:  hQp://gu.com/p/2jxgj The  scariest  graph  you’ll  ever  see.  Read  the  ar#cle  by  Maryn  McKenna:   hQp://www.wired.com/wiredscience/2011/02/not-­‐many-­‐an.bio.cs/
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×