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Questions and Answers
What role do dendrites play in neurones?
What role do dendrites play in neurones?
- They protect the neurone from damage.
- They receive impulses from other neurones. (correct)
- They initiate the response in effectors.
- They transmit impulses away from the cell body.
Which statement best describes the function of effectors?
Which statement best describes the function of effectors?
- Effectors facilitate the conduction of signals to sensory neurones.
- Effectors solely transmit electrical impulses.
- Effectors produce a targeted response to stimuli. (correct)
- Effectors interpret sensory information.
What are the three main types of neurones?
What are the three main types of neurones?
- Effector, sensory, and integrative.
- Sensory, associative, and peripheral.
- Motor, central, and peripheral.
- Sensory, motor, and relay. (correct)
What is the function of the myelin sheath on an axon?
What is the function of the myelin sheath on an axon?
Which action exemplifies the role of a motor neurone?
Which action exemplifies the role of a motor neurone?
Flashcards
Neurones
Neurones
Specialized cells that transmit signals throughout the body.
Axons
Axons
Long fibers that carry signals away from the neuron's cell body.
Myelin Sheath
Myelin Sheath
Fatty sheath that insulates axons, speeding up signal transmission.
Dendrites
Dendrites
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Effectors
Effectors
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Study Notes
Neurone Types
- Three main types of neurons: sensory, motor, relay
- All have a long axon, insulated by a myelin sheath for efficient long-distance signal transmission.
- Axons are very long
Neurone Structure
- Tiny branches (dendrons) extend out from the neuron, which further branch into dendrites.
- Dendrites receive impulses from other neurons.
Effectors
- Effectors (muscles and glands) produce responses to stimuli
- Examples of effector responses:
- Glands releasing hormones into the bloodstream (e.g., adrenaline, insulin)
- Muscles contracting (e.g., leg movement)
- Muscles secreting substances (e.g., saliva from salivary glands)
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