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Neuroscience Reflex Arc Quiz

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Questions and Answers

Which neuron is responsible for transmitting signals from the sensory receptor to the spinal cord?

Motor Neuron

Relay Neuron

Effector Neuron

Sensory Neuron (correct)

What happens immediately after the sensory neuron transmits a signal to the spinal cord?

The muscle contracts.

The receptor is reset.

The brain processes the signal for awareness.

The signal is relayed to a motor neuron. (correct)

Which of the following best describes a reflex response?

It is an automatic and rapid response to stimuli. (correct)

It requires complex processing in the brain.

It occurs after the individual becomes aware of the stimulus.

It is under conscious control at all times.

What is the role of the motor neuron in the reflex arc?

<p>To send the response signal to the effector. (D)</p> Signup and view all the answers

How does awareness of a reflex action occur in relation to the response?

<p>Awareness occurs after the reflex response. (B)</p> Signup and view all the answers

Flashcards

Reflex Arc

The pathway by which a reflex action occurs, involving sensory, relay, and motor neurons.

Sensory Neuron

Neurons that transmit signals from sensory receptors to the spinal cord.

Relay Neuron

Neurons in the spinal cord that connect sensory and motor neurons, facilitating reflex actions.

Motor Neuron

Neurons that transmit signals from the spinal cord to muscles or glands, causing a response.

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Involuntary Response

A quick, automatic reaction to a stimulus, occurring without conscious thought.

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Study Notes

Reflex Arc

Reflex responses are involuntary and don't involve the conscious part of the brain.
Awareness of the reaction happens after it occurs.
This makes responses automatic and quick, helping to prevent damage to the body.
A reflex arc involves sensory neurons, relay neurons, and motor neurons.

Neuron Types

Sensory Neuron: Carries the impulse from the receptor to the spinal cord.
Relay Neuron: Connects the sensory neuron to the motor neuron in the spinal cord.
Motor Neuron: Carries the impulse from the spinal cord to the effector (e.g., muscle).

Reflex Arc Pathway

Impulse starts at a receptor in the body.
Transmitted along the sensory neuron to the spinal cord.
Signal goes to relay neuron within the spinal cord.
Transmitted along the motor neuron to an effector (muscle).
A signal is also sent to the brain.

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Description

Explore the fundamentals of the reflex arc in this quiz. Understand the roles of sensory, relay, and motor neurons in reflex responses. Test your knowledge on the pathways involved in involuntary reactions and how they help protect the body.