Multiple Choice
Which would be present in an animal with a nerve net?
45. Nervous System
Central and Peripheral Nervous System
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Which of the following is a true statement regarding a reflex response?
A
The response is carried out solely by the peripheral nervous system
B
Pain receptors in the skin send a message to the brain to initiate motor movement.
C
It is a conscious response to painful stimuli.
D
None of the listed responses is correct.
E
It requires a sensory neuron, an interneuron, and motor nerves.
Verified step by step guidance1
Understand the concept of a reflex response: A reflex is an involuntary and nearly instantaneous movement in response to a stimulus. It is a simple, automatic response that does not require conscious thought.
Identify the components involved in a reflex arc: A typical reflex arc involves a sensory neuron, an interneuron, and a motor neuron. The sensory neuron detects the stimulus and sends a signal to the spinal cord.
Explain the role of the interneuron: The interneuron, located in the spinal cord, processes the information received from the sensory neuron and relays it to the motor neuron.
Describe the function of the motor neuron: The motor neuron carries the signal from the interneuron to the effector, such as a muscle or gland, to produce a response.
Clarify why the other statements are incorrect: Reflex responses are not solely carried out by the peripheral nervous system, do not require the brain to initiate motor movement, and are not conscious responses. Therefore, the correct statement is that a reflex requires a sensory neuron, an interneuron, and motor nerves.
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