Eyes & Ears
Two sensory organ that can detect stimuli from distant objects
Sound
What is the stimulus for hearing?
Chemical
What is the stimulus for taste?
Light
What is the stimulus for sight?
Pressure
What is the stimulus for touch?
Eyes
Nose
Skin
Tongue
Ears
What are the sense organs?
Sensitive to stimuli
Sense organs
Co-ordinates a response to the stimulus
Central Nervous system
Receptors
What allows the sense organs to react to the stimuli?
Sensory Neurone
Motor Neurone
Receptor->............-> CNS->............-> Effector
Nerves
Neurones usual.y occur in bundles known as?
Electrical Impulses from receptors
What do sensory neurones carry?
Brain and spinal cord
What does the CNS consist of?
From the CNS to the rest of the body
Where does the motor neurone carry information
Effector
Where does the response to the stimulus occur?
Muscle
Gland
Name two effectors
Central Nervous System
What does CNS stand for?
Sensory Neurones
What carries information the the CNS?
Brain and spinal cord
What does the CNS consist of?
When an impulse arrives at the junction it is transferred by chemicals which diffuse across the gap, these then set off a new electrical signal in the next neurone
Describe what happens at a synapse
Conscious i.e we think about them (if a room is dark, we turn on a light)
Voluntary responses
Unconscious i.e we do not 'decide' to do this ( if a room is dark the pupil will dilate to allow more light into the eye. Reflex responses are involuntary
Involuntary responses
Writing
Reading
Examples of voluntary responses
Sneezing
Coughing
Sweating
Examples of involuntary responses
An automatic, often protective, response
Reflex response
With reflex responses the coordinator is a relay neurone in either the spinal cord or the unconscious area of the brain.
What is the difference between a reflex response compared with a voluntary response?
Either side of a relay neurone
Where are synapses?
Glands
Where are hormones released from?
Chemical messengers which travel in the blood to activate target cells
Hormones
Increases
FSH does what when an egg is released?
A way of preventing a woman getting pregnant
Contraceptive
Pituitary gland
Where is FSH produced?
Ovaries
Where is Oestrogen produced?
Pituitary gland
Where is LH produced?
Your organs and enzymes cannot work properly if the temperature keeps changing
Why is homeostasis important?
FSH
What hormone causes the eggs to mature?
Oestrogen
What hormone causes growth of the uterus lining?
Phototropism
A plants response to light?
Geotropism
A plants response to gravity?
Hydrotropism
A plants response to water?
Auxin
What is the plant hormone?
When a shoot tip is exposed to light, more auxin accumulates on the side that's in the shade. This makes the cells grow faster on the shaded side, so the shoot bends towards the light.
How do shoots grow towards the light?
When a shoot is growing sideways, gravity produces an unequal distribution of auxin, more auxin is on the lower side. This causes the lower side to grow faster bending the shoot upwards.
How do shoots grow away from gravity?
Promotes growth
Auxin does what in a plant's shoots?
Inhibits growth
Auxin does what in a plant's roots?
A root growing sideways will have more auxin on its lower side (due to gravity). But the extra auxin inhibits growth causing the top of the root to grow faster and making toe root bend downwards.
How do roots grow towards gravity?
An uneven amount of moisture on one side of the root produces more auxin on that side. This inhibits the growth on that side causing the root to bend towards the moisture.
How do roots grow towards moisture?
-Successful weed killers
-Effective and safe
-Kills weeds but not grass or crops
Advantages of using plant hormones
-In high doses can strip leaves off trees
-Causes terrible damage to forests
-People can be affected by the powerful chemicals
Disadvantages of using plant hormones
Eyes & Ears
Two sensory organ that can detect stimuli from distant objects
Sound
What is the stimulus for hearing?
Chemical
What is the stimulus for taste?
Light
What is the stimulus for sight?
Pressure
What is the stimulus for touch?
Eyes
Nose
Skin
Tongue
Ears
What are the sense organs?
Sensitive to stimuli
Sense organs
Co-ordinates a response to the stimulus
Central Nervous system
Receptors
What allows the sense organs to react to the stimuli?
Sensory Neurone
Motor Neurone
Receptor->............-> CNS->............-> Effector
Nerves
Neurones usual.y occur in bundles known as?
Electrical Impulses from receptors
What do sensory neurones carry?
Brain and spinal cord
What does the CNS consist of?
From the CNS to the rest of the body
Where does the motor neurone carry information
Effector
Where does the response to the stimulus occur?
Muscle
Gland
Name two effectors
Central Nervous System
What does CNS stand for?
Sensory Neurones
What carries information the the CNS?
Brain and spinal cord
What does the CNS consist of?
When an impulse arrives at the junction it is transferred by chemicals which diffuse across the gap, these then set off a new electrical signal in the next neurone
Describe what happens at a synapse
Conscious i.e we think about them (if a room is dark, we turn on a light)
Voluntary responses
Unconscious i.e we do not 'decide' to do this ( if a room is dark the pupil will dilate to allow more light into the eye. Reflex responses are involuntary
Involuntary responses
Writing
Reading
Examples of voluntary responses
Sneezing
Coughing
Sweating
Examples of involuntary responses
An automatic, often protective, response
Reflex response
With reflex responses the coordinator is a relay neurone in either the spinal cord or the unconscious area of the brain.
What is the difference between a reflex response compared with a voluntary response?
Either side of a relay neurone
Where are synapses?
Glands
Where are hormones released from?
Chemical messengers which travel in the blood to activate target cells
Hormones
Increases
FSH does what when an egg is released?
A way of preventing a woman getting pregnant
Contraceptive
Pituitary gland
Where is FSH produced?
Ovaries
Where is Oestrogen produced?
Pituitary gland
Where is LH produced?
Your organs and enzymes cannot work properly if the temperature keeps changing
Why is homeostasis important?
FSH
What hormone causes the eggs to mature?
Oestrogen
What hormone causes growth of the uterus lining?
Phototropism
A plants response to light?
Geotropism
A plants response to gravity?
Hydrotropism
A plants response to water?
Auxin
What is the plant hormone?
When a shoot tip is exposed to light, more auxin accumulates on the side that's in the shade. This makes the cells grow faster on the shaded side, so the shoot bends towards the light.
How do shoots grow towards the light?
When a shoot is growing sideways, gravity produces an unequal distribution of auxin, more auxin is on the lower side. This causes the lower side to grow faster bending the shoot upwards.
How do shoots grow away from gravity?
Promotes growth
Auxin does what in a plant's shoots?
Inhibits growth
Auxin does what in a plant's roots?
A root growing sideways will have more auxin on its lower side (due to gravity). But the extra auxin inhibits growth causing the top of the root to grow faster and making toe root bend downwards.
How do roots grow towards gravity?
An uneven amount of moisture on one side of the root produces more auxin on that side. This inhibits the growth on that side causing the root to bend towards the moisture.
How do roots grow towards moisture?
#NAME?
Advantages of using plant hormones
#NAME?
Disadvantages of using plant hormones