Diseases
What is a disease?
Something that makes you ill. An abnormality from a normal functioning organism.
What are the two major control systems in animals?
Nervous and Hormonal (Endocrine)
Name the 4 types of drugs used for treating / preventing diseases.
Medicine - Antibiotic - Antiviral - Vaccine
What does abundance refer to?
How common a species is in a habitat.
What is diffusion.
The overall movement of particles from high concentration to lower concentration.
List three things antibodies can do to microorganisms.
Make it easier to be ingested
Make them stick together
Cause them to burst open
Name at least 5 organs in the nervous system
Brain, Spinal Cord, Nerves, Sense organs, Effectors
Explain why medicines are drugs.
They affect how the body / mind works.
What are the 4 methods of taking a sample from the book?
quadrat - sweep nets - pitfall traps - beating a tree with a cloth underneath
Which object has more surface area to volume ratio. a sphere or a cube of the same volume?
A cube
What are the 2 major types of white blood cells
Lymphocyte
Phagocyte
What is meant by the word hormone?
Chemical messengers for the body produced by glands.
Decribe how scurvy can be treated.
Add vitamin C to diet.
What is a transect used to measure?
Distribution of species in a habitat.
Explain how tropical sprue could cause anaemia.
It reduces surface area of the intestines causing less diffusion of nutrients into the body.
Name all 5 types of disease
Infectious
Deficiency
Genetic
Lifestyle
Autoimmune
Where is the growth hormone produced?
Pituitary gland
What is a transgenic organism? Give an example.
An organism with DNA from different species.
Ex. Insulin producing bacteria / insulin producing cows
What is meant by biodiversity?
How many different species are in a habitat / community.
What is osmosis?
the overall movement of a solvent (usually water) through a partially permeable membrane
Explain how vaccinations stop the spread of a disease in a community
Vaccinated people stop the virus from replicating and adapting. More vaccinations stops the virus from passing to others.
Describe a flow chart from stimilus to effectors in animals. (nervous system) 5 parts
Stimili - impulse - Brain (sensory) -relay - effectors
What is an enzyme give 3 examples in the body.
A organic substance that breaks down large insoluble molecule into small soluble ones.
Saliva
Stomach acid
Digestive fluid from pancreas / liver
The accuracy of a estimate is how close it is to the true value. Estimates are mor accurate if...... (3 answers)
The sample is larger
It is easy to find the organisms
The organisms are spread out evenly rather than clumped.
Why is Teacher Von's shiny head always so cold compared to his students non shiny heads?
SA: V Ratio