Sign up to get unlimited access to thousands of study materials. It's free!

Access to all documents

Join milions of students

Improve your grades

By signing up you accept Terms of Service and Privacy Policy

RECEPTORS Any organ that detects a change: → Eyes →mouth → Skin →nose → ears Changes in the environment SIMUS RECIPIOR a muscle or gland the response will be a muscle contraction or hormone release (2 muscles) regulates how much protects the eye Surface and focuses light CORNEA- rays light enters the eye focuses light on reting EFICIOR LENS the neuron that Sends an electrical impulse from the receptor within the sense organ to the coordination centre (CNS) CILARY MUSCLES change the shape of the lense SENSORY NEURON RELAY NEURON MOTOR NEURON THE EYE RETINA VITREOUS HUMOR THE REFLEX ARC clear liquid that keeps the eye firm. SUSPENSORY LIGAMENTS SPINAL CORD →Senses light →contains rods and Icones which detect light + images happens when the body needs to act immediately e.g. when you touch something hot. SCLERA holds lense in place INFORMATION RAYD 10 THE BRAIN FOVEA will signal the effector muscle with an electrical impulse through a motor neurone. OPTIC NERVE white casing → extremely quick and does not require a concious response from the brain. + pancreas is a coordination centre transmits impulses to the brain →in sensory neurones STIMULUS RECEPTOR ↓ COORDINATION EFFECTOR RESPONSE THE NERVOUS SYSTEM FOCUSING THE EYE electrical impulses arrive at the end of a neuron and Stimulates chemicals called neurotransmitters to be released from the neuron. SOMETHING NEAR TO US: • lense becomes thicker to retract more light. •ciliary muscles contract happens through the CNS → brain or Spinal cord o suspensory ligaments slacken • increases thickness of the lense SYNAPSES Space where two neurones meet and electrical impulses need to travel across. SOMETHING FAR AWAY FROM us: •less becomes thinner to refract less light • ciliary muscles relax • Suspensory ligaments tighten • making lense thinner. PRESYNAPTIC NEURONE VESCE CONTAINING NURSIER SYNAPSE NEXPRE DEFUSES ACROSS GAP + binds to receptor molecules on the next neuron. -Circular muscles contract •Radial muscles relax THE PUPIL REFLEX →n rapid involuntary response •pupil becomes...

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

13 M

Pupils love Knowunity

#1

In education app charts in 11 countries

900 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.

Alternative transcript:

smaller so less light enters. • Circular muscles relax • radial muscles contract RUOPIOR • pupil becomes larger so that more light enters. BRIGHT LIGHT the binding of the receptors Stimulates an electrical impulse in the neuron which travels along the neuron until it reaches the end and this OM IGHT POSISINAPIC NERON process starts again ORCUAR MISCES CONTRA FADAL MISCES RELAK PUPI BECOMES SMALLER AND WISS UGHT VERS ORCULAR MUSCUS REAK -RADAR MUSCLES ONRA PUPIL BECOMES BIGGER AND MORE UGHT INTERS