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Questions and Answers
How would severing the axon of a neuron affect its function?
How would severing the axon of a neuron affect its function?
- The neuron would be unable to receive incoming signals.
- The neuron would be unable to produce neurotransmitters.
- The neuron would be unable to transmit outgoing signals. (correct)
- Synaptic transmission would be enhanced due to increased neurotransmitter release.
If a drug blocked the function of neurotransmitters at the synapse, what would be the most likely result?
If a drug blocked the function of neurotransmitters at the synapse, what would be the most likely result?
- Normal signal transmission between neurons.
- Prevention of signal transmission between neurons. (correct)
- Increased speed of signal transmission between neurons.
- Enhanced growth of dendrites on the receiving neuron.
Which of the following describes the correct sequence of signal transmission in a neuron?
Which of the following describes the correct sequence of signal transmission in a neuron?
- Dendrites -> Axon -> Cell Body
- Axon -> Cell Body -> Dendrites
- Dendrites -> Cell Body -> Axon (correct)
- Cell Body -> Axon -> Dendrites
A researcher discovers a new chemical that significantly increases the number of dendrites on neurons. What effect would this chemical likely have on neuronal communication?
A researcher discovers a new chemical that significantly increases the number of dendrites on neurons. What effect would this chemical likely have on neuronal communication?
How would damage to the cell body of a neuron most likely affect the neuron's function?
How would damage to the cell body of a neuron most likely affect the neuron's function?
Flashcards
Neuron
Neuron
The basic unit of the nervous system that carries signals.
Dendrites
Dendrites
Parts of a neuron that carry impulses toward the cell body.
Axon
Axon
Part of a neuron that transmits impulses away from the cell body.
Synapse
Synapse
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Neurotransmitters
Neurotransmitters
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Study Notes
Nerve Cell (Neuron)
- Nerve cells are the basic units of the nervous system, essential for carrying messages (impulses).
- Dendrites carry impulses towards the cell body.
- Axons carry impulses away from the cell body.
- The cell body contains a nucleus and other structures.
- The axon terminal transmits impulses.
- The myelin sheath covers the axon in some neurons, enabling faster signal transmission.
- Nodes of Ranvier are gaps in the myelin sheath.
Definitions
- Axon: The part of the neuron that transmits impulses away from the cell body.
- Dendrite: The branch-like structures of the neuron that receive impulses.
- Cell Body: The spherical part of the neuron that contains the nucleus and connects dendrites to axons.
- Synapse: The space between neurons where information is transferred electrochemically.
- Neurotransmitters: Brain chemicals that facilitate signal transmission from one neuron to the next across the synapse.
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