Summary
A fast, automatic pathway from sensory neuron to motor neuron, often through the spinal cord.
In depth
Receptor, sensory neuron, interneuron in the spinal cord, motor neuron and effector. Reflexes are fast because the pathway is short and bypasses the brain. Example: the knee-jerk (patellar) reflex is monosynaptic.
Reflexes can be innate or conditioned. Reflex testing assesses neurological function. Withdrawal reflexes involve polysynaptic circuits.
Common mistake: reflexes do not require the brain for execution, though the brain is informed.
Frequently asked questions
What is Reflex Arc?
A fast, automatic pathway from sensory neuron to motor neuron, often through the spinal cord.
Which area of biology covers Reflex Arc, and how advanced is it?
Reflex Arc is one of the 54 topics in Neuroscience. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Neuron, Nervous System, Spinal Cord Functions.
Why does Reflex Arc matter?
Reflexes protect the body and help clinicians test nerve function.
What should I learn before Reflex Arc?
Reflex Arc is a Beginner topic, so no earlier topic is required. Other Beginner topics in Neuroscience that pair well with it include Nervous System, Neuron, Central and Peripheral Nervous Systems.
What topics are related to Reflex Arc?
The closest topics to Reflex Arc are Neuron, Nervous System, Spinal Cord Functions, Neuropharmacology. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Reflex Arc?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Reflex Arc. To practise the whole of Neuroscience, use the Neuroscience quiz.
How is Reflex Arc different from Neuron?
Reflex Arc: A fast, automatic pathway from sensory neuron to motor neuron, often through the spinal cord. Neuron: A nerve cell with dendrites, a cell body and an axon that transmits electrical signals. Read both side by side and note what each one explains.
What is a common mistake about Reflex Arc?
Reflexes do not require the brain for execution, though the brain is informed.
How should I study Reflex Arc step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Neuron and explain the difference aloud. Finally, take the Neuroscience quiz and come back to this page for any question you miss.