Biology | Chemistry | Physics | Controlled Assessments | Long Answer Questions | 11-14 Science | Big Moments in Science | Linkup |
Microbes and DiseasesMicrobes are Micro-organisms These are tiny living things that can only be seen using microscope There are 4 main groups of microbes that are of interest to human beings, these are:
Most micro-organisms are harmless e.g.
Pathogens- are microbes that cause disease (the harmful ones)1. Bacteria Structure- Bacteria are made of single cells. They have:
Reproduction: Bacteria reproduce by Cell division. Once a cell is big enough, it splits in two. How they cause disease: Most bacteria produce toxins (poisons) which make us ill. 2. Fungi Structure- Fungi are made of cells, from single celled yeast (unicellular) to many cells (multicellular) in Bread mould and mushrooms. The cells have:
How they cause disease
Examples of Fungal diseases: thrush, athletes foot, ringworm Importance of Fungi
3. VirusesViruses are the tiniest microbes They live inside living cells only Structure:
Reproduction and how they cause disease The way viruses reproduce is the way that they use to cause disease.
The nuisance of viruses It is hard to treat viral diseases as:
Examples of viral diseases Chicken pox, measles, Flu, AIDS
4. Protozoans Protozoans are single celled, water-borne micro-organisms Structure They have:
Diseases They mainly cause diseases that are a result of drinking dirty water.
|
Key terms Micro = Tiny Organism = Living thing Scope = to see Bacteria living on our skin and digestive systems is called our Microflora (more like a forest of bacteria) Our microflora helps get rid of dead cells on our skin.
Scientists also think that these bacteria in our digestive system may help with our immune system and may possibly affect how we feel (our mood?) and think. Wow! Reminder: Ribosomes are tiny particles in a cell that make proteins. Mitochondria carry out respiration. They release energy.
Challenge yourself: 1. What are antibiotics? Which of these microbes do they kill? 2. Find out about bacteria and Antibiotic resistance. Why should we be very concerned about it? |