Life Science Grade 11

Grade 11 Life Sciences Lesson Plans• Phagocytes are white blood cells that will engulf and digest pathogens that theyencounter in the body• Sometimes the acquired immunity is obtained through artificial ways such as when youare given a vaccination. (This will be discussed in the next lesson)• Plants also have an active immune response• When a part of a plant becomes infected with a bacterial or viral pathogen, theinfected cells die quickly to prevent the spread of the disease• The plant also has what is known as a Systemic Acquired Resistance(SAR) to infections• The plant produces salicylic acid where the infection starts• Some of this is converted to methyl salicylate which is inactive• This builds up and is carried by the phloem to uninfected tissues• It is then converted back to salicylic acid which helps prevent infection• Have learners draw a concept map for the immune response described in humans2.2 Conclusion• Refer to chalkboard summary, transparency etc. and summarise the lesson. It may benecessary to restate the important concepts• Stress the fact that both plants and animals have a type of defence against pathogensthrough their immune system• Concept map may be completed for homework1. Learners completeconcept map in theirworkbooks15 min5 min• Solutions for all Life Sciences Gr.11 pp. 40 – 41; OxfordSuccessful Life Sciences Gr. 11pp. 22 - 24• Internet reference: (Example ofconcept map used to organizedata on immune system)• http://ebooks.maconk12.org/PH_Biology/Disc2/ebook/products/0-13-115516-4/brgo0400.pdf• Teacher reference for conceptmap• http://cmapspublic3.ihmc.us/rid=1178472505313_378108100_21726/immune%20system.cmap• Video on the immune response• http://www.youtube.com/watch?v=IWMJIMzsEMg• Concept map to becompleted learners’ workbookReflection/Notes:Name of Teacher:HOD:Sign:Sign:Date:Date:Term 1 Page 20© Gauteng Department of Education (CAPS version)