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Summary Questions for unit 6 for AQA A-Level biology
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Summary questions for each topic in unit 6 tailored in correlation with the AQA A-Level biology specification
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SPECIFICATION RELATED SUB-TOPIC QUESTIONS1. Define a stimulus and response
2. Explain the advantage to organisms of being able to respond to stimuli.
3. Describe taxes,kineses and tropism
4. Explain how each type of response increases an organism's chance of survival
1. Describe the stimuli plants respond to
2. Describe the plant growth factors such as IAA
3. Explain phototropism in flowering plants
4. Explain gravitropism in flowering plants
1. Explain how a simple reflex arc works
2. Explain the roles sensory,intermediate and motor neurons play in a reflex arc
3. Outline the importance of reflex arcs.
1. Describe the main features of sensory reception.
2. Describe the structure and function of a Pacinian corpuscle
3. Explain how receptors work together in the eye.
1. Describe the autonomic nervous system
2. Explain how the autonomic nervous system controls heart rate
3. Explain the role chemical and pressure receptors play in the process of controlling
heart rate.
1. Distinguish between nervous and hormonal coordination
2. Describe the different types of neurons
3. Describe the structure of a myelinated motor neuron.
1. Describe the nature of the resting potential.
2. Explain how a resting potential is established in a neuron
3. Explain what an action potential is
1. Explain how an action potential passes along an unmyelinated axon
2. Explain how an action potential passes along a myelinated axon
1. Describe the factors that affect the speed of conductance of an action potential
2. Explain what is meant by the refractory period
3. Explain the meaning of the all - or- nothing principle
4. Explain the role of the refractory period in separating one impulse from another
1. Describe the structure and function of a synapse
2. Explain how information is transmitted across the synapse
1. Describe the gross and microscopic structures of a skeletal muscle
2. Describe the ultrastructure of a myofibril.
3. Explain how actin and myosin are arranged in the myofibril.
1. State where the energy for muscle contraction comes from.
2. Explain how the sliding filament mechanism causes a muscle to contract and relax.
3. Summarise the evidence that supports the sliding filament mechanism of muscle
contraction.
4. Explain what is meant by antagonistic muscles and how they operate.
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