Keeping Healthy
- Created by: Jazzmassey1
- Created on: 01-03-14 14:11
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- Keeping Healthy
- Diet and excersize
- Both obese and starving people can be malnourished
- you become malnourished if you have a lack of something in your diet
- unbalanced diet
- Lack of vitamins
- Lack of vitamins
- unbalanced diet
- you become malnourished if you have a lack of something in your diet
- Water balance
- controlled by the kidneys
- they control it by producing different concentrations of urine
- Alcohol consumption
- causes us to produce a greater amount of dilute urine.
- causing dehydration
- causes us to produce a greater amount of dilute urine.
- controlled by the kidneys
- Both obese and starving people can be malnourished
- Homeostatis
- Our bodies need to control things like body temperature and water level to keep them constant.
- Keeps internal conditions the same
- Body temp. 37 °C and water levels
- Challenges
- Outside environment is constantly changing
- Strenuous exercise, or living in a hot or cold environment, affect our body temperature and water balance.
- we have different body systems to enforce this
- receptors
- respond to stimuli-temperature change
- receptors
- temp to high
- hairs flatten on our arms
- Sweat- so that heat can evaporate from your skin
- Vasodilation- hypothalamus detects temperature change, sends impulses which cause blood vessels supplying the capillaries in the skin to dilate.
- The increased blood flow to the surface tissues under the skin means that more heat is lost.
- Vasodilation- hypothalamus detects temperature change, sends impulses which cause blood vessels supplying the capillaries in the skin to dilate.
- Sweat- so that heat can evaporate from your skin
- hairs flatten on our arms
- temp to high
- Shiver
- Hair on our arms satnd up to trap heat
- Shiver
- Vaccinations and antibiotics
- vaccines contain a dead weekened or inactive from of a disease
- these all act as anti gens
- they stimulate white blood cells which produce andti-bodies
- these all act as anti gens
- Ignaz semmelweiss
- it is difficult to develop a drug that will kill viruses and not damage tissues.
- Alexander flemming
- discovered penicillin
- Mutations in bacteria can result in them becoming resistant to antibiotics, turning the bacteria into a ‘superbug’. Superbugs can develop while a person is taking a course of antibiotics.
- Resistance
- Over time, bacteria can become resistant to certain antibiotics: this is an example of natural selection. In a large population of bacteria, there may be some that are not affected by the antibiotic.
- These survive and reproduce, creating more bacteria that are not affected by the antibiotic.
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- These survive and reproduce, creating more bacteria that are not affected by the antibiotic.
- Over time, bacteria can become resistant to certain antibiotics: this is an example of natural selection. In a large population of bacteria, there may be some that are not affected by the antibiotic.
- vaccines contain a dead weekened or inactive from of a disease
- Disease and Resistance
- pathogens are micro-organisms that cause infectious diseases.
- Bacteria
- bacteria release toxins when inside the body causing you to feel ill.
- living cellls
- multiply quickly in the right conditions, of warmth moisture and nutrients.
- Viruses
- they have a protective protein coat.
- reproduce inside host cells, causing it to burst open
- they then pass thorough the blood stream
- Bacteria
- Lines of defence
- Natural barriers
- skin
- Sweat chemicals
- Stomach acid
- tear chemicals
- White blood cells
- ingest and destroy
- produce anti bodies and destroy
- produce anti-toxins and neutralise the towins
- anti-bodies and toxins are specialised proteins
- memory cells
- can respond quickly when it meets a micro organism for a second time.
- produces antibodies to destroy
- can respond quickly when it meets a micro organism for a second time.
- Natural barriers
- pathogens are micro-organisms that cause infectious diseases.
- disease transmission
- direct contact: mother to chiild trough placenta, hands
- indirect: wet contaminated floors
- airborne droplets
- Insect Bites
- food and water. natural disasters
- heart disease
- heart disease occurs when cour coronary arteries become clogged.
- Your arteries carry blood from the heart, and veins return blood to it.
- heart disease occurs when cour coronary arteries become clogged.
- drug testing
- tested on model human cells in a lab
- animal testing
- clinical trials with healthy volunteers
- double blind trials
- neither the patient or doctor know who has the placeblo
- double blind trials
- clinical trials with healthy volunteers
- animal testing
- tested on model human cells in a lab
- Diet and excersize
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