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21 Cards in this Set
- Front
- Back
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What is a synapse? |
It is a junction between two nerve cells |
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What is an effector? |
It is an organ or cell that acts in response to a stimulus. |
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What is the difference between a sensory neurone and a motor neurone? |
1. A sensory neurone carrys impulses to the CNS where as the motor neurone carrys information from the CNS to the rest of your body. |
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What is the order of the reflex arc? |
Receptor -> sensory neurone -> synapse -> relay neurone -> synapse -> motor neurone -> effector -> response |
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What is the order of the CNS? |
Stimulus -> motor neurone -> relay neurone -> spinal cord -> synapse ->sensory neurone -> effector |
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What are the two types of effector? |
1. Muscle 2. Gland |
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At what speed do electrical impulses travel? |
100m/s |
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What happens at the pre-synaptic knob? |
1. The electrical impulse arrives at the pre-synaptic knob. 2. The electrical impulse makes the vesicles move until they arrive at the cell membrane of the pre-synaptic knob. 3. The chemicals are released and they diffuse across the synapse. 4. The chemicals bind to the receptor sites which creates an electrical impulse. 5. The electrical impulse travels back through the post-synaptic knob. |
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What does FSH stand for? |
Follicle stimulating hormone |
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What does LH stand for? |
Luteinising horemone |
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Where is oestrogen secreted from? |
Ovaries |
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Where is FSH secreted from? |
Pituitary gland |
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What does FSH do? |
1. It matures the eggs in the ovaries 2. It stimulates the production of oestrogen |
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What does the production of oestrogen do? |
1. It stimulates the lining of the womb 2. It stimulates the pituitary gland to make LH |
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What does the production of LH do? |
Stimulates the release of a mature egg |
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What is the hormone in a plant called? |
Auxin |
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What are the three things plants are sensitive to? |
1. Light 2. Water 3. Gravity |
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How do the shoots of a plant grow? |
1. Shoots grow towards light 2. They grow against gravity |
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How do the roots of a plant grow? |
1. They grow towards moisture/water 2. They grow in the direction of gravity |
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If light is coming at a plant directly downwards, how will the plant grow? |
1. The auxin is evenly distributed 2. The auxin moves away from the light 3. This stimulates the growth of cells 4. The plant grows straight up |
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If light is coming at a plant sideways, how will the plant grow?
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1. The auxin will move away from the light 2. The auxin become unevenly distributed 3. The auxin stimulates the growth of cells on one side of the plant, causing this side to grow faster. 4. The plant bends towards the light. |
