Explain how the eye responds to different light levels.

Light is a sensory stimulus detected by the eye. Rods and cones located in the retina of the eye respond to light. The pupillary reflex is responsible for controlling the amount of light hitting the retina. In bright light, circular muscles contract and radial muscles relax to make the pupil smaller. In dim light the opposite occurs, circular muscles relax and radial muscles contract in order to make the pupil wider and allow more light into the eye. 

DS
Answered by Dominic S. Biology tutor

18225 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What is the process of osmosis?


What is a gene?


What is the role of the rough endoplasmic reticulum in a eukaryotic cell?


Explain how arteries and veins differ in their structure and how this relates to their function? (4)


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