LS things Flashcards
What are microorganisms
Microorganisms are very small organisms that live all around us
What are four types of microorganisms
Viruses, Bacteria, Protists, and Fungi
When are viruses visible
When viewed with an electron microscope
Viruses cannot be classified as…
True living organisms; they show no characteristics of life
What do viruses need to reproduce
Viruses need another living cell, called a host cell
What are viruses seen as
Parasites
Diseases caused by viruses
HIV, Hepatitis B, Ebola virus, Adenovirus, Influenza, Bacteriophage
What are microorganisms that cause diseases called
Pathogens
What does HIV mean
Human immunodeficiency virus
What does HIV do
It attacks and destroys cells of your immune system
How can HIV be transmitted
-Unprotected intercourse with an HIV infected person
-HIV infected mother to unborn baby
-Breast milk from HIV infected mother to baby
-Direct contact with infected blood
What slows down the rate at which HIV reproduces
Antiretriviral drugs (ARVs)
Diseases that attack your body when your immune system is weak are called
Opportunist infections, eg: pneumonia and TB
What ability do bacteria have
Bacteria can live in habitats too harsh for other organisms
Bacteria are bigger than viruses- but you need an… to see them
Electron microscope
What can scientists grow bacteria in
Petri dishes containing agar
Different types of bacteria
Cocci (round), Bacilli (rod), Spirilla (spiral)
Symptoms of TB
-Persistent cough for more than two weeks
-Chest pains and coughing up blood
-Tiredness/headaches
-Night sweats
-Unexplained weight loss
What are ptotista
Small plant or animal like microorganisms that live in water
What are amoeba
Unicellular protists that can alter their shape by extracting and retracting limps called pseudopods
What is malaria
A protist
Symptoms of malaria
Headaxhes
Fatigue
Nausea
Diarrhoea
Muscle aches
Vomiting
Fever
Chills
What are fungi
Microorganisms that feed on dead plants and animals; decomposers
Examples of harmful fungu
Athlete’s foot, ringworm
