Receptors Detect Stimuli

Receptors Detect Stimuli

Open Ended

What are your 5 senses?

Multiple Select

How many senses do you have?

• 5

• 9

• 12

• 21

Open Ended

•A common misconception (mistake/ misunderstanding.

Some neurologists state that humans have anywhere from 9 to 21 senses (depending on how you classify them.

Can you guess some of the “extra” senses.

Responding to Change

• Your body can respond to changes in the environment

• Receptors can detect changes and pass the information to other parts of the body.

• Definition: A stimulus is any information your body receives and responds to.

Poll

Which is a response to change?

• You drink water because you are feeling thirsty

• Your pupils changing size when you first turn on a light in the morning

• You feel cold and your body starts to shiver

• When you travel in a car and begin to feel motion sickness

We regularly respond to change

• We regularly are responding to changes without even realising it!

• When you are hungry or thirsty your body is communicating with your brain to tell you to find food or water.

• This is similar when you have a headache or are tired. 

• Our body's respond to external stimuli eg. sights, sounds or touch

• Our body's respond to internal stimuli  eg. hunger, thirst and fatigue

Open Ended

What is the definition for a stimulus

Multiple Choice

An example of an external stimulus is

• You body responding to light

• Your body responding to hunger

• Your body responding to fatigue

• An immune response when your body detects a pathogen.

Multiple Choice

An example of an internal stimulus response

• Your body responding to temperature

• Your body responding to hearing a sound

• An immune response when your body detects a pathogen

• Your body going into a fight or flight response to danger

Sight

• Sight can tell us more about the world than any other sense.

• Your pupils can change size to control the amount of light which can enter the eye.

• The photo-receptor cells at the back of the eye transform light into nerve signals for your brain.

• It's not your eyes which allow you to see, it's your brain!

Hearing

• Sounds cause particles in the air to vibrate - causing your eardrum to vibrate.

• Our ears have tiny bones that detect vibrations.

• Ears are also important for balance. A common symptom of a ear infection is problems with balance. Balance being one of the “extra” senses.

• https://www.youtube.com/watch?v=n1m4h79JZso 

Open Ended

What are some of the basic tastes our taste buds can recognise?

Taste

• Your tongue is the sense organ that detects chemicals  

• Inside the grooves there are many taste buds which are taste receptors.

Smell

• Our Smell depends on chemical receptors found in each of our nostrils.

• There are millions of smell receptors inside our nose, they detect chemicals in the air.

Touch

• Touch is felt all over the body through your skin.

• The skin allows us to have the sense of touch, it detects changes in temperature, pressure and pain

• Information is collected by these receptors and sent to the brain for processing

Multiple Choice

A receptor is

• A response to change

• Your senses

• A structure that detects a change in the body

• Part of your brain