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Questions and Answers
Which of the following scenarios are most likely to trigger a reflex reaction?
Which of the following scenarios are most likely to trigger a reflex reaction?
- Touching a scalding hot surface. (correct)
- Experiencing a sudden, extremely loud noise. (correct)
- Listening to a friend whisper a secret.
- Engaging in a complex mathematical problem.
Within a reflex arc, what combination of neuron types facilitates the rapid, involuntary response?
Within a reflex arc, what combination of neuron types facilitates the rapid, involuntary response?
- Sensory, synapse, and motor neurons
- Relay, synapse, and effector neurons
- Sensory, relay, and motor neurons (correct)
- Relay, effector, and motor neurons
Which of the following accurately represents the sequential order of components in a reflex arc, beginning with stimulus detection?
Which of the following accurately represents the sequential order of components in a reflex arc, beginning with stimulus detection?
- Sensory neuron → Sensory receptor → Motor neuron → Relay neuron → Effector
- Sensory receptor → Sensory neuron → Relay neuron → Motor neuron → Effector (correct)
- Sensory neuron → Sensory receptor → Relay neuron → Motor neuron → Effector
- Sensory receptor → Sensory neuron → Motor neuron → Relay neuron → Effector
Which combination of features best describes a reflex action?
Which combination of features best describes a reflex action?
How does an impulse typically travel from the relay neuron to the motor neuron within a reflex arc?
How does an impulse typically travel from the relay neuron to the motor neuron within a reflex arc?
What type of signal does the brain send to diminish or halt a reflex action?
What type of signal does the brain send to diminish or halt a reflex action?
In the context of a reflex arc, what is the primary role of the sensory receptor?
In the context of a reflex arc, what is the primary role of the sensory receptor?
What is the role of the relay neuron (also known as an interneuron) within the spinal cord during a reflex action?
What is the role of the relay neuron (also known as an interneuron) within the spinal cord during a reflex action?
How does the motor neuron contribute to the overall function of a reflex arc?
How does the motor neuron contribute to the overall function of a reflex arc?
In a reflex arc, what is the effector responsible for doing?
In a reflex arc, what is the effector responsible for doing?
When you quickly pull your hand away from a hot stove, what part of your nervous system is primarily responsible for this action?
When you quickly pull your hand away from a hot stove, what part of your nervous system is primarily responsible for this action?
Which of the following best explains why reflex actions are so rapid?
Which of the following best explains why reflex actions are so rapid?
In what way does an overriding signal from the brain alter the typical function of a reflex arc?
In what way does an overriding signal from the brain alter the typical function of a reflex arc?
How might damage to the relay neuron in a reflex arc affect the body's response to a stimulus?
How might damage to the relay neuron in a reflex arc affect the body's response to a stimulus?
What would be the likely outcome if the sensory neuron in a reflex arc were damaged?
What would be the likely outcome if the sensory neuron in a reflex arc were damaged?
If a person touches a hot object but does not immediately pull away, what could be the reason for this delayed reaction?
If a person touches a hot object but does not immediately pull away, what could be the reason for this delayed reaction?
How does the structure of the reflex arc contribute to its function in protecting the body?
How does the structure of the reflex arc contribute to its function in protecting the body?
Why is it important for the neurotransmitters to be cleared or recycled from the synaptic cleft after an impulse has been transmitted?
Why is it important for the neurotransmitters to be cleared or recycled from the synaptic cleft after an impulse has been transmitted?
During a medical examination if a doctor taps your patellar tendon, what is the expected response and why does it occur?
During a medical examination if a doctor taps your patellar tendon, what is the expected response and why does it occur?
How does the integration of a sensory impulse occur between a sensory neuron and a relay neuron?
How does the integration of a sensory impulse occur between a sensory neuron and a relay neuron?
Flashcards
What is a reflex reaction?
What is a reflex reaction?
An automatic response to a stimulus that does not involve conscious thought.
What are the 3 neuron types in a reflex arc?
What are the 3 neuron types in a reflex arc?
Sensory, relay, and motor neurons.
What is the order of a reflex arc?
What is the order of a reflex arc?
Sensory receptor → sensory neuron → relay neuron → motor neuron → effector.
What are characteristics of a reflex action?
What are characteristics of a reflex action?
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How does impulse travel between neurons?
How does impulse travel between neurons?
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How to override a reflex action?
How to override a reflex action?
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Study Notes
- The text is a quiz about the structure and function of a reflex arc
Causes of a Reflex Reaction
- Touching a hot pan and a loud bang can cause a reflex reaction
Neurons Involved in a Reflex Arc
- Three types of neurons involved in a reflex arc are sensory, relay, and motor neurons
Stages of a Reflex Arc
- Reflex arcs proceed from a sensory receptor to a sensory neuron before continuing to the relay neuron, then the motor neuron, and finally the effector
Features of a Reflex Action
- Reflex actions are involuntary and quick
Impulse Travel
- Impulses travel chemically from the end of the relay neuron to the motor neuron
Overriding a Reflex Action
- The brain sends an overriding signal down a neurone to override a reflex action
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