Nerve impulses

Last updated: 31/03/2022
AQA A-Level Biology Nervous coordination Nerve impulses
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  1. A nerve impulse, like a lightning strike, is a/an ________ phenomenon.

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  2. Differences in sodium-potassium concentration create an electrical gradient across the cell membrane, which is called a _____?

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  3. Electrical impulses gather and accumulate in which part of a neuron, in order to initiate an action potential?

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  4. Motor neurons transmit signals to _________to control their functional output.

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  5. The neurons that detect external stimuli and convert it into information that the rest of the nervous system can process are called?

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  6. When a neuron is not actively transmitting a nerve impulse, it is in a _____ state.

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  7. Neurons are ______ cells.

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  8. The tightly controlled membrane _______ is critical for the transmission of nerve impulses.

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  9. The opening of axon membrane voltage-gated potassium channels is responsible for which part of the action potential?

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  10. The cell body of the neuron is known as the…?

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  11. Motor neurons are multipolar in structure, which means they possess…?

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  12. Branch-like extensions found at one end of a neuron are known as…?

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  13. Some neurons are coated with a _____ ?

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  14. The cell bodies of motor neurons are found in the…?

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  15. The _______ is involved in the planning and execution of voluntary actions.

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  16. There are ________ of motor neurons.

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  17. Neurons that control muscle contractions in response to external forces through the intrafusal fibres are called…?

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  18. The ________, sometimes known as the patellar reflex, is a medical test that doctors carry out to assess the function of your nervous system.

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  19. Non-neuronal cells that provide structure and support to neurons are called…?

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  20. The neurons that act as the “middle men” and form connections between the other two types of neurons are known as…?

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  21. What is the name of the periodic gaps in the myelin sheath where the signal is recharged as it moves along the axon?

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  22. Which of the following is a genetic disease that causes neurons in the brain to waste away and die?

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  23. Being polarised means that the electrical charge on the outside of the membrane is _______ while the electrical charge on the inside of the membrane is _____.

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  24. Certain metabolic diseases can affect the nervous system. For example, people with diabetes can develop a nervous system problem called diabetic neuropathy. What are the symptoms of diabetic neuropathy?

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  25. Which of these has the highest permeability in a resting nerve cell?

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