Microbes

abbylebus
Flashcards by abbylebus, updated more than 1 year ago
abbylebus
Created by abbylebus over 7 years ago
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Science (Biology) Flashcards on Microbes, created by abbylebus on 12/05/2013.
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Question Answer
What does the word symptoms mean? The affect the microbes have on your body.
A doctor observes symptoms to come up with a…? Diagnosis
16. How can microbes be spread? 16. By air, water, touch, food, animals and sex.
List a few ways in which diseases can be stopped from spreading. • Making sure sewage is treated and disposed of properly • Adding chlorine to water to kill bacteria • Drying, freezing or refrigerating foods • Pasteurising milk • Using disinfectants, antiseptics and soaps • Immunising people with vaccines
Your body has……………to stop microbes getting in? Natural defenses
Give some examples of natural defenses. Skin, mucus in the trachea and nose, ciliated epithelial cells to sweep mucus away
List ways in which your body can destroy microbes. • A chemical in tears that kills some bacteria • Acid in the stomach that kills some bacteria • White blood cells that engulf microbes • Other white blood cells that make antibodies to help destroy microbes.
How does breast milk help babies to fight infections? Antibodies can pass through the placenta that is found in breast milk.
22. What do antibiotics do? 22. Cure some diseases.
Using too much antibiotics can do what? Leaves behind the resistant bacteria, which then cause disease that are difficult to treat.
What is a micro-organism? A very small living thing that you need a microscope to be able to see them.
What are the three main types of microbes? Viruses, Bacteria, Fungi.
What are the most common fungus microbes? Yeasts.
Why are viruses not usually considered to be living? They cannot carry out any of the seven life processes for themselves.
5. What 2 microbes are important in making some foods and drinks? 5. Bacteria and Yeasts.
What is the equation for aerobic respiration performed by yeast cells? Glucose + Oxygen= Carbon Dioxide + Water
What is fermentation? When yeast cells use anaerobic respiration.
What is the equation for anaerobic respiration performed by yeast cells? Glucose=Carbon Dioxide + Ethanol
What is the word for the number of organisms in an area? Population
In what conditions would yeast cells grow rapidly in an environment? Warm, Moist, plenty of sugar
How does the population of these cells stop growing? When something runs out (e.g sugar)
What is the name of the thing that stops them? Limited Factor
What does infectious mean? Diseases that can be spread from person to person.
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