Fighting diseases. Flashcards
7 things needed for a balanced diet?
Carbohydrates Proteins Fats Fibre Vitamins Mineral ions Water
What are the 2 main types of pathogens?
- Bacteria
2. Viruses
How do bacteria make you ill?
- Damage your cells.
2. Produce toxins.
How do viruses make you ill?
- Replicate by invading your cells.
- Uses cells machinery to make copies of themselves.
- Cells then burst - releasing new viruses.
- Cell damage makes you ill.
How does your body defend itself?
- Skin
- Hairs
- Mucus
- White blood cells
What do white blood cells do?
They engulf the bad cells and digest them.
How can bacteria become resistant to antibiotics?
They can mutate, and sometimes this causes them to become resistant too an antibiotic.
Who cut deaths by using antiseptics?
Semmelweis.
Eyes (light receptors)
Sensitive to light - these cells have a nucleus, cytoplasm and cell membrane.
Ears (sound receptors)
Sensitive to sound - sensitive to changes in position.
Nose (smell receptors)
Sensitive to chemical stimuli.
Tongue (taste receptors)
Sensitive to different tastes - chemical stimuli.
Skin receptor
Sensitive to touch, pressure, pain and temperature change.
What is the CNS?
The Central Nervous System.
What does the CNS do?
All the information from the sense organs is sent it, and is where reflexes and actions take place.
