Transcript Lesson 2 - Angelfire

Unit 8C Lesson 2 Fungus and
Penicillin
Objectives: to learn about yeast and
fungus and some of their useful
applications.
Targets: 1and 3
Fungus
• These are plant like organisms but they have no
chloroplasts. Two of the types of fungus you will
be most familiar with are mushrooms and mould.
• Generally speaking fungus like warm, moist, dark
places to grow.
• There are three types of fungus you need to know
about:
– Yeast
– Athletes Foot
– Penicillin
Yeast
• Yeast are micro-organisms which reproduce
by dividing in half.
• As they grow they produce two useful
substances for us:
– When we put yeast in bread it produces carbon
dioxide. This is what makes the bread rise.
– When make beers, wines, and liquors yeast
produces the alcohol.
Athletes Foot
• Athletes foot is a type of fungus which grows in between toes
and under toenails.
• It is often picked up by going barefoot in public places such as
showers, swimming pools, and gym changing rooms.
• It generally starts with mild itching and can become inflamed if
not treated.
• Things you can do to prevent Athlete’s Foot:
Wash your feet daily.
Dry your feet well.
Avoid tight footware.
Wear sandals in hot weather.
Wear clean breathable socks.
Go barefoot at home.
Use anti-fungal powders in your
shoes.
Use foot powders to absorb
moisture.
Penicillin
• Penicillin is a type of mould which grows naturally on
bread.
• Penicillin is given to people who have been infected by
bacteria. The penicillin kills the bacteria.
• Because penicillin kills bacteria it is called an antibiotic.
• Penicillin was discovered by Alexander Flemming.
– Flemming was growing bacteria in a lab.
– This plates of bacteria he was growing were accidentally
infected with penicillin.
– Flemming noticed that the penicillin killed any bacteria it
came into contact with.
• Large batches of penicillin were first grown by Howard
Florey and Ernst Chain.
Work to Do
•
•
•
•
Read pages 78 to 79
Complete questions 1-2 page 79
Complete Activity Sheet 7.2
Homework
– Complete H/W sheet 7.2 this is going to take
some internet of library research.
– Define the following keywords:
• Antibiotic, fungus, inflammation, penicillin, yeast