B3
- Created by: niduka
- Created on: 18-03-18 16:08
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- sugar control
- insulin-lowers blood glucose level
- glucagon-increases blood glucose level
- Homeostasis
- type 1 diabetes - pancreas doesn't secrete insulin
- thermore gulatory centre,personal thermostat
- kidneys remove urea from blood adjust ions and water in the blood
- removal of waste and water control
- kidney dialysis and transplants
- removal of waste and water control
- body temp water+ion content,blood sugar level
- kidneys remove urea from blood adjust ions and water in the blood
- thermore gulatory centre,personal thermostat
- B3
- Transport systems in plants and animals
- the blood system
- stents, heart valves
- veins-thin walls,low pressure, valves
- capillary narrow thin walled blood vessels
- Double circulatory system oxygenated blood>lungs>oxygenated blood>heart>pumped around body
- arteries thick walls, muscle elastic tissue, contracts,prevent blood flow
- Transport systems in plants
- thick rigid walls to prevent from falling
- Phloem
- End walls =holes make movements easy
- sieve tube =no nucleus,but living tissue
- Dissolved sugars from leaves to rest of plant (storage regions)
- companion cells= sugars transported by AT
- End walls =holes make movements easy
- Xylem
- constant movement= transpiration stream
- transports water and mineral ions from root to stem + leaves
- constant movement= transpiration stream
- Phloem
- thick rigid walls to prevent from falling
- the blood system
- Movement of molecules in and out of cells
- Gaseous Exchange
- Inspiration- intercostal muscles contract thorax volume increases, pressure decreases, air draws in
- Exchange systems in plants
- Root hair cells- long hairs, large SA uses active transport
- increase in transpiration rate: hot, dry windy
- guard cells lose water, deflate, cells no longer curve, close up
- stormata closes when transpiration increases
- Expiration- intercostal muscles relax, thorax volume decreases, pressure increases air forces out
- Dissolved subs
- Osmosis diffusion and active transport
- villi-large SA (micro villi) thin,good blood supply
- alveoli- large SA, thin alveolus wall,ventilated, blood supply from RBC
- Exchanging materials: large SA,thin,good blood supply, ventilates
- Gaseous Exchange
- Transport systems in plants and animals
- type 1 diabetes - pancreas doesn't secrete insulin
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