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111 Cards in this Set
- Front
- Back
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how do genes chromosomes and DNA work |
1) nucleus 2) contains genetic material 3) arranged into chromosomes 4) each is a molecule of DNA 5) short length is a gene 6) different versions are alleles |
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symptoms of Cystic fibrosis |
1) sticky and thick mucus in lungs and airways 2) affects gut and pancreas so food not digested properly 3) respiratory infections |
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sickle cell disease symtoms |
1) red blood cells stick together blocking blood vessels 2) very tired and out of breath 3) organ damage |
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where is water loss in the body from |
the lungs when we exhale the skin by sweating the body in urine |
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why will your urine get pale |
on a cold day or when you're not exercising you don't sweat do you'll produce more urine which is pale because the waste is more diluted |
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why will urine be dark |
on a hot day or when exercising you sweat so less urine which is darker as more concentrated |
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how do we lose ions |
ions being taken into the body by food and then absorbed into the blood lost in sweat kidneys will remove the excess from the blood and get rid in urine |
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what happens when glucose levels are too high |
insulin is secreted into the blood and liver converts glucose into glycogen so glucose level goes down |
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what does glucogen do |
caused the conversion of glycogen to glucose |
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how does glucagon regulate blood glucose levels |
1) the pancreas releases it when blood sugar levels fall 2) this causes the cells in the liver to turn glycogen back to glucose which is then released into the blood 3) blood sugar levels will rise |
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how do you calculate BMI |
weight in kg divided by height in m |
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what is type 2 |
when a persons cells respond less well to insulin so the cells are resistant to it |
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what is type 1 |
when the pancreas doesn't produce insulin so when concentrations rise the body can't bring them down |
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how do reflex actions happen |
1) stimulus 2) pain receptor stimulated 3) signal sent along sensory 3) signal passed to relay 4) message sent to brain 5) signal sent to motor 6) motor sends signal to effector 7) effector produces response and muscle contracts |
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what are dendrons |
has many branches on the end called dendrites which receive impulses from receptor cells |
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what's myelin sheath |
the axon is surrounded by a fatty layer known as the myelin sheath. This helps to protect the neurone and allow impulses to travel faster |
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what's myelin sheath |
the axon is surrounded by a fatty layer known as the myelin sheath. This helps to protect the neurone and allow impulses to travel faster |
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how does neurotransmission work |
1) electrical impulse travels along an axon. 2) triggers neuron to release chemical messengers called neurotransmitters. 3) these chemicals diffuse across the synapse and bind with receptors on the. next neuron. |
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what's myelin sheath |
the axon is surrounded by a fatty layer known as the myelin sheath. This helps to protect the neurone and allow impulses to travel faster |
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how does neurotransmission work |
1) electrical impulse travels along an axon. 2) triggers neuron to release chemical messengers called neurotransmitters. 3) these chemicals diffuse across the synapse and bind with receptors on the. next neuron. |
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what does the sensory neurone do |
carries signals from receptors to Spinal chord and brain |
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what's myelin sheath |
the axon is surrounded by a fatty layer known as the myelin sheath. This helps to protect the neurone and allow impulses to travel faster |
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how does neurotransmission work |
1) electrical impulse travels along an axon. 2) triggers neuron to release chemical messengers called neurotransmitters. 3) these chemicals diffuse across the synapse and bind with receptors on the. next neuron. |
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what does the sensory neurone do |
carries signals from receptors to Spinal chord and brain |
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what does the relay neurone di |
carries messages from one part of CNS to another |
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what's myelin sheath |
the axon is surrounded by a fatty layer known as the myelin sheath. This helps to protect the neurone and allow impulses to travel faster |
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how does neurotransmission work |
1) electrical impulse travels along an axon. 2) triggers neuron to release chemical messengers called neurotransmitters. 3) these chemicals diffuse across the synapse and bind with receptors on the. next neuron. |
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what does the sensory neurone do |
carries signals from receptors to Spinal chord and brain |
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what does the relay neurone di |
carries messages from one part of CNS to another |
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what does motor neurone do |
carries signals from CNS to effectors |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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what's the advantage of negative geotrophism |
more chance of finding light |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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what's the advantage of negative geotrophism |
more chance of finding light |
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describe positive phototropism in shoots |
the auxin in the shade promotes growth and causes cells to elongate so the shoot grows in the direction of the light and causes it to tilt sideways |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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what's the advantage of negative geotrophism |
more chance of finding light |
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describe positive phototropism in shoots |
the auxin in the shade promotes growth and causes cells to elongate so the shoot grows in the direction of the light and causes it to tilt sideways |
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describe negative geotropism in shoots |
the auxin on the Lower side of the shoot promotes growth and causes the cells to elongate so the direction of growth is upwards |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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what's the advantage of negative geotrophism |
more chance of finding light |
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describe positive phototropism in shoots |
the auxin in the shade promotes growth and causes cells to elongate so the shoot grows in the direction of the light and causes it to tilt sideways |
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describe negative geotropism in shoots |
the auxin on the Lower side of the shoot promotes growth and causes the cells to elongate so the direction of growth is upwards |
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describe positive geotropism in roots |
the auxin on the Lower side of the shoot inhibits growth and causes cells on the upper side to grow faster so root is downwards |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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what's the advantage of negative geotrophism |
more chance of finding light |
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describe positive phototropism in shoots |
the auxin in the shade promotes growth and causes cells to elongate so the shoot grows in the direction of the light and causes it to tilt sideways |
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describe negative geotropism in shoots |
the auxin on the Lower side of the shoot promotes growth and causes the cells to elongate so the direction of growth is upwards |
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describe positive geotropism in roots |
the auxin on the Lower side of the shoot inhibits growth and causes cells on the upper side to grow faster so root is downwards |
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negative phototropism in roots |
auxin is produced on side of moisture this inhibits growth on that side causing it to grow in that direction |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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what's the advantage of negative geotrophism |
more chance of finding light |
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describe positive phototropism in shoots |
the auxin in the shade promotes growth and causes cells to elongate so the shoot grows in the direction of the light and causes it to tilt sideways |
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describe negative geotropism in shoots |
the auxin on the Lower side of the shoot promotes growth and causes the cells to elongate so the direction of growth is upwards |
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describe positive geotropism in roots |
the auxin on the Lower side of the shoot inhibits growth and causes cells on the upper side to grow faster so root is downwards |
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negative phototropism in roots |
auxin is produced on side of moisture this inhibits growth on that side causing it to grow in that direction |
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what do gibberellins do |
a germinating seed releases gibberellins also stimulated flower and fruit production starch stored in the seed is turned into sugars that the seed uses for energy to grow |
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how are plant hormones used |
in weed Killers rooting powder to control fruit ripening |
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what does auxin do |
it's a plant hormone that makes cells elongate |
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what's the advantage of positive phototropism |
maximum light for photosynthesis |
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what's the advantage of negative phototropism |
less chance of drying out |
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what's the advantage of positive geotropism |
more chance of finding moisture |
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what's the advantage of negative geotrophism |
more chance of finding light |
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describe positive phototropism in shoots |
the auxin in the shade promotes growth and causes cells to elongate so the shoot grows in the direction of the light and causes it to tilt sideways |
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describe negative geotropism in shoots |
the auxin on the Lower side of the shoot promotes growth and causes the cells to elongate so the direction of growth is upwards |
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describe positive geotropism in roots |
the auxin on the Lower side of the shoot inhibits growth and causes cells on the upper side to grow faster so root is downwards |
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negative phototropism in roots |
auxin is produced on side of moisture this inhibits growth on that side causing it to grow in that direction |
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what do gibberellins do |
a germinating seed releases gibberellins also stimulated flower and fruit production starch stored in the seed is turned into sugars that the seed uses for energy to grow |
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what do weed killers do |
they kill some plants but not others. contain growth hormones that causes weeds to grow too quickly. weed killer is absorbed in larger quantities by the weeds than the beneficial plants |
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what do weed killers do |
they kill some plants but not others. contain growth hormones that causes weeds to grow too quickly. weed killer is absorbed in larger quantities by the weeds than the beneficial plants |
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what does rooting power do |
makes stem cuttings quickly develop roots |
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what do weed killers do |
they kill some plants but not others. contain growth hormones that causes weeds to grow too quickly. weed killer is absorbed in larger quantities by the weeds than the beneficial plants |
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what does rooting power do |
makes stem cuttings quickly develop roots |
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what is fruit ripening |
some slow the ripening and others speed it up. |
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what do weed killers do |
they kill some plants but not others. contain growth hormones that causes weeds to grow too quickly. weed killer is absorbed in larger quantities by the weeds than the beneficial plants |
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what does rooting power do |
makes stem cuttings quickly develop roots |
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what is fruit ripening |
some slow the ripening and others speed it up. |
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why is fruit ripening useful |
for delaying ripening during transport |
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what do weed killers do |
they kill some plants but not others. contain growth hormones that causes weeds to grow too quickly. weed killer is absorbed in larger quantities by the weeds than the beneficial plants |
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what does rooting power do |
makes stem cuttings quickly develop roots |
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what is fruit ripening |
some slow the ripening and others speed it up. |
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why is fruit ripening useful |
for delaying ripening during transport |
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what is seedless fruit plant hormone |
flowers r sprayed with plant hormones that cause fruits to develop but not the seeds |
