Biology revision

What is the nervous System?
The network of nerve cells and fibres which transmits nerve impulses between parts of the body.
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what do neurons do when they are stimulated?
Transmit impulses
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What are axons surrounded by?
A fatty sheath
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What is a Synapse?
The gap between two neurons
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What is the pathway of a reflex arc?
Receptor - sensory neuron - spinal cord - motor neuron - effector
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How do drugs affect the nervous system?
They change the transmission of impulses across synapses
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What are the steps of the carbon cycle?
Plants take in CO2 > plants respire CO2 > Animals eat plants > carbon goes into animals fat & protein > CO2 return when animal respires > burning wood & fuels cause CO2
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what is carbon in the carbon cycle used for in plant bodies?
Carbohydrates, fats and proteins
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What is the word equation for photosynthesis?
carbon dioxide + water (+ light energy) → glucose + oxygen
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What are the limiting factors in photosynthesis?
light intensity, carbon dioxide concentration, temperature
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What is Tropism?
A tropism is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus.
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what is auxin?
a plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.
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Other cards in this set

Card 2

Front

what do neurons do when they are stimulated?

Back

Transmit impulses

Card 3

Front

What are axons surrounded by?

Back

Preview of the front of card 3

Card 4

Front

What is a Synapse?

Back

Preview of the front of card 4

Card 5

Front

What is the pathway of a reflex arc?

Back

Preview of the front of card 5
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