Describe the reflex arc.

A stimulus (for example a pin) stimulates the receptor which causes a nerve impulse in the sensory neuron. The impulse travels to a synapse in the spinal cord, where chemicals diffuse across the gap in the synapse and stimulate an impulse in the relay neurone. This travels to another synapse and an impulse in the motor neurone, which travels to the effector, causing a response (for example moving hand)

SS
Answered by Sophie S. Biology tutor

9593 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Explain the key steps in mitosis.


What's the difference between cell division and cell differentiation?


What is natural selection?


The average lifespan of a human male can vary from 40 years to 85 years. The lifespan partly depends on the things available in the country where the man lives. Suggest three things that would increase the chance of a man having a longer lifespan.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences