11646530
Description
Flashcards by lily bevan, updated more than 1 year ago
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Created by lily bevan
almost 7 years ago
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| Question | Answer |
| What are symptoms? | The feelings/changes you experience in your body when you are ill when your body's cells/systems have been damaged or are not working normally. |
| What are diseases caused by? | + Viruses, bacteria, fungi, or protists. + Person's lifestyle, their environment, or their genes. |
| What are communicable diseases? | Diseases caused by an infection can be passed from one organism to another. |
| What are non-communicable diseases? | Diseases that are not caused by an infection, and can only be passed down (occasionally) through genes. |
| What is an example of a communicable disease? | Athlete's foot |
| What is an example of a non-communicable disease? | Coronary heart disease. |
| What is an example of helpful bacteria? | Bacteria that live in your gut & help you digest food & protect you against harmful bacteria. |
| What type of organisms are fungi and protists? | Eukaryotic organisms. |
| What fungi is single-celled? | Yeasts |
| When can bacteria, fungi, & protist reproduce? | Whenever conditions are warm w/ plenty of nutrients, moisture, & space. |
| What is special about viruses? | They are not made of cells. Each virus particle is made of genetic material wrapped in a layer of protein & sometimes fat molecules. |
| How do viruses reproduce? | By invading living cells. |
| What is a pathogen? | Something that causes disease. |
| How quickly does bacteria divide in ideal conditions? | They divide every 20 minutes. |
| Why does the rate @ which bacteria reproduce begin to decline & eventually stop? | When nutrients & space start to run out, the rate slows down, & eventually the bacteria's own waste products eventually poison them. |
| How do pathogens cause symptoms of disease? | + by damaging our cells by invading & reproducing + by releasing toxins |
| What is the incubation period? | The delay between infection & the appearance of symptoms. |
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