Key term
Eduqas A-Level Biology A400QS
Biological Molecules
Cell Structure and Organisation
Cell Membranes and Transport
Enzymes
Nucleic Acids and Their Functions
Importance of ATP
Photosynthesis
Respiration
Microbiology
Population Size and Ecosystems
Topic overviewPopulation growth and its measurementThe population growth curve and carrying capacityDensity dependent and density independent factorsSampling abundance and distributionEcosystems, habitats and communitiesEnergy transfer and pyramids of biomassSuccessionDecomposition and the carbon cycleThe nitrogen cycle and human interventionEutrophication and the effects of drainage
Human Impact on the Environment
Classification and Biodiversity
Topic overviewThe need for classification and the taxonomic hierarchyThe three domain and five kingdom systemsCharacteristic features of the five kingdomsAssessing relatedness by physical features and biochemistryThe species concept and the binomial systemBiodiversity, adaptation and natural selectionMeasuring biodiversity in a habitatGenetic and molecular measures of biodiversity
Mitosis and Meiosis
Sexual Reproduction in Humans
Sexual Reproduction in Plants
Inheritance
Variation and Evolution
Application of Reproduction and Genetics
Topic overviewThe Human Genome Project, other sequenced genomes and genomics in healthcareScreening embryos, stem cells and the ethical issuesGenetic fingerprinting, PCR and electrophoresis in forensic workRecombinant DNA and the production of human insulinGenetically modified crops and gene therapy
Adaptations for Gas Exchange
Topic overviewSurface area to volume ratio and gas exchange in small organismsSpecialised respiratory surfaces and the need for ventilationGills and counter current flow in bony fishThe human breathing system and its histologyVentilation and gas exchange in humansThe insect tracheal systemThe angiosperm leaf, stomata and gas exchange
Adaptations for Transport
Topic overviewVascular systems compared across animal groupsThe mammalian heart and blood vesselsThe cardiac cycle and its controlBlood, haemoglobin and dissociation curvesThe Bohr effect, chloride shift and tissue fluidThe root and the uptake of waterThe endodermis and the entry to the xylemXylem, transpiration and cohesion-tensionThe potometer and xerophytes and hydrophytesPhloem and translocation
Adaptations for Nutrition
Homeostasis and the Kidney
The Nervous System
Immunology and Disease: Disease and Its TransmissionImmunology
Immunology and Disease: AntibioticsImmunology
Immunology and Disease: The Immune ResponseImmunology
Human Musculoskeletal Anatomy: Skeletal TissuesMusculoskeletal
Topic overviewCartilage and its three typesThe composition and functions of compact boneBone remodelling and the Haversian systemRickets, osteomalacia, osteoporosis and brittle bone diseaseThe structure of skeletal muscleThe sliding filament theoryFast and slow twitch fibres, and energy for contraction
Human Musculoskeletal Anatomy: Structure and Function of the SkeletonMusculoskeletal
Human Musculoskeletal Anatomy: JointsMusculoskeletal
Neurobiology and Behaviour: The BrainNeurobiology
Neurobiology and Behaviour: NeuroscienceNeurobiology
The Nervous System
- 8 subtopics
- 24 things to know
- Component 3
What The Nervous System covers
The Nervous System is examined in Component 3, Requirements for Life. It covers the components of a nervous response, the spinal cord and spinal nerves, the reflex arc and nerve nets, the structure of a motor neurone, the nerve impulse, oscilloscope traces and conduction speed, the synapse and synaptic transmission and chemicals affecting transmission.
Where it is assessed
Component 3
Requirements for Life, the compulsory section of the paper.
Check the Eduqas specification ↗The 8 subtopics
Each one has its own page.
- The components of a nervous responseComponents of a nervous response in order, external stimulus and the receptor that detects it and internal stimulus and its receptor.Open →
- The spinal cord and spinal nervesCentral canal, spinal nerve and dorsal root ganglion.Open →
- The reflex arc and nerve netsReflex action, pathway of a simple spinal reflex arc and nerve net.Open →
- The structure of a motor neuroneMain parts of a motor neurone, myelin sheath and nodes of Ranvier.Open →
- The nerve impulseResting potential of an axon, action potential and refractory period.Open →
- Oscilloscope traces and conduction speedPeak value reached on the trace, total change in potential difference during an action potential and three factors affecting the speed of conduction along an axon.Open →
- The synapse and synaptic transmissionSynaptic cleft, neurotransmitter used at a neuromuscular junction and sequence of events in synaptic transmission.Open →
- Chemicals affecting transmissionEffect of inhibiting acetylcholinesterase, psychoactive drug and balanced conclusion about chemicals acting on synapses.Open →
What you need to know
Answer each one before you reveal it.
Your recallNot started
Process
Describe the sequence of events in synaptic transmission.
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List the components of a nervous response in order.
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What are the two main regions seen in a transverse section of the spinal cord?
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Name the main parts of a motor neurone.
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What is the resting potential of an axon?
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What does an oscilloscope trace of an action potential show?
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What is an organophosphate?
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What is a stimulus?
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What shape does the grey matter take in transverse section?
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What is a reflex action?
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What does the cell body of a motor neurone contain?
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How is the resting potential maintained?
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What value does an oscilloscope trace of an action potential start and finish at?
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What is a synapse?
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What is the effect of inhibiting acetylcholinesterase?
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What is a receptor?
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What does the grey matter contain?
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How many synapses are there in a three-neurone reflex arc?
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What are dendrites?
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Why does the inside of a resting axon carry a negative charge?
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What is the total change in potential difference during an action potential?
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What is the synaptic cleft?
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What symptoms follow from the continuous stimulation caused by an organophosphate?
Take The Nervous System further
The same content, four other ways.
Questions from this topic
Each one with the model answer underneath.
- 1
List the components of a nervous response in order.
Model answer
Stimulus, receptor, sensory neurone, co-ordinator, motor neurone, effector, response.
- 2
What is a stimulus?
Model answer
A change in the internal or external environment that an organism can detect.
- 3
What is a receptor?
Model answer
A cell or structure that detects a particular stimulus and converts it into a nerve impulse.
- 4
Give two examples of an external stimulus and the receptor that detects it.
Model answer
Light detected by the rods and cones of the retina, and sound detected by the hair cells of the cochlea.
- 5
Give an example of an internal stimulus and its receptor.
Model answer
A change in blood carbon dioxide concentration, detected by chemoreceptors in the aorta and carotid arteries.
- 6
What is a transducer, in this context?
Model answer
Any receptor that converts one form of energy, such as light or pressure, into the electrical energy of a nerve impulse.
What is inside Levo
Six ways to work the same material.
The Nervous System revision questions
- What does The Nervous System cover in Eduqas A-Level Biology?
- 8 subtopics: the components of a nervous response, the spinal cord and spinal nerves, the reflex arc and nerve nets, the structure of a motor neurone, the nerve impulse, oscilloscope traces and conduction speed, the synapse and synaptic transmission and chemicals affecting transmission. Each one has its own page with questions and model answers.
- How is The Nervous System organised?
- By the Eduqas A400QS specification, subtopic by subtopic, so it matches the order you are taught it in.
Every question in The Nervous System, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
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