b3
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- Created by: claud
- Created on: 29-04-13 13:20
define osmosis
the movement of water molecules across a partially permeable membrane
1 of 45
name three ways that substances move
active transport, diffusion and osmosis
2 of 45
where in the body are the lungs found?
thorax
3 of 45
define ventilation
the movement of air in and out of the lungs
4 of 45
artificial ventilators help people to...
breathe
5 of 45
where does gas exchange happen?
lungs
6 of 45
name the main feature that villi have
large surface area
7 of 45
what are root hairs specialised for absorbing?
water and minerals
8 of 45
which process do root hairs use to take in minerals?
active transport
9 of 45
what do phloem tubes do?
transport food
10 of 45
what do xylem tubes do?
take water upwards
11 of 45
what is transpiartion?
the loss of water from the plant
12 of 45
what do arteries do?
carry blood away from the heart
13 of 45
what do capillaries do?
exchange materials at the tissues
14 of 45
what do veins do?
carry blood to the heart
15 of 45
what do red blood cells do?
carry oxygen
16 of 45
what do white blood cells do?
defend against disease
17 of 45
what do platelets do?
help blood to clot
18 of 45
what does plasma do?
carries substances in blood
19 of 45
what does a stent do?
keeps arteries open
20 of 45
define homeostatis
the maintenance of a constant internal environment
21 of 45
name six things in the body which must be controlled
urea, carbon dioxide, blood sugar, temperature, water content, ion content
22 of 45
list two ways in which the body responds when it is too hot
choose from: hairs lie flat, sweat produced, blood vessels dilate
23 of 45
list two ways in which the body responds when it is too cold`
hairs stand up, no sweat produced, blood vessels constrict, shivering
24 of 45
what three things do kidneys do?
remove urea, adjust ion content, adjust water content
25 of 45
what three substances does a sports drink replace?
ions, sugar and water
26 of 45
list the three stages of filtering in a kidney
ultrafiltration, reabsorption and release of wastes
27 of 45
what do kidneys remove from the blood?
waste substances
28 of 45
what do dialysis machines do?
filter blood
29 of 45
can transplanted oragans be rejected by the body?
yes
30 of 45
how can transplanted organs be prevented from rejecting?
immunosuppresive drugs, matching tissue type
31 of 45
which two hormones control blood glucose levels?
insulin and glucagon
32 of 45
type 1 diabetes is caused by a lack of...
insulin
33 of 45
list two ways to control diabetes
avoid simple carb foods, inject insulin at mealtimes
34 of 45
how does increasing amounts of waste affect water?
sewage and toxic chemicals pollute lakes, rivers, oceans by washing into them, plants and animals affected
35 of 45
how does increasing amounts of waste affect air?
smoke and gases pollute air, acid rain
36 of 45
how does increasing amounts of waste affect land?
toxic chemicals from farming, nuclear waste buried underground, landfill sites
37 of 45
list the four main human activities that reduce available land
building, farming, dumping waste and quarrying
38 of 45
give three examples of places where co2 can be sequestered
oceans, lakes and ponds, green plants, peat bogs
39 of 45
four main problems caused by deforestation
more methane, more co2, less co2, less biodiversity
40 of 45
what is the effect of destroying peat bogs?
more co2 to atmosphere
41 of 45
give some examples of the effects of global warming
rising sea levels, change in weather patterns, change in migration patterns, biodiversity reduced, melting ice caps, flooding
42 of 45
which process makes biofuels?
anaerobic fermentation
43 of 45
what product is produced when sugar is anaerobically fermented?
ethanol
44 of 45
what product is produced when waste material is anaerobically fermented?
biogas
45 of 45
Other cards in this set
Card 2
Front
name three ways that substances move
Back
active transport, diffusion and osmosis
Card 3
Front
where in the body are the lungs found?
Back
Card 4
Front
define ventilation
Back
Card 5
Front
artificial ventilators help people to...
Back
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