What is a reflex arc and why is it important?

A reflex arc is made up of a receptor (which detects a stimulus), a sensory neurone, a relay neurone, a motor neurone and an effector (which brings about a response). The neurones are not joined to each other, there is a small gap between them called a synapse. Impulses travel through the reflex arc and cross the synapse by means of a chemical diffusing through the gap.The reflex arc brings about a reflex action, which is a fast, automatic response to a stimulus. This is important as it helps us avoid harm or danger.

Answered by Janella B. Biology tutor

3922 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Describe how a sperm cell is adapted to its role


What are the main similarities and differences in the structure of plant and animal cells?


Explain the differences between aerobic and anaerobic respiration (in animals), when the transition occurs and why there is a need for the body to remove lactic acid that is built up during the process?


Why was Charles Darwin's theory of evolution by natural selection not accepted at the time?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences