Exploring Stimulus part 2 Lesson 4

Exploring Stimulus part 2

By Rahan Rahman

Learning intentions

Success: Students can distingusih between different types of stimuli

Stretch: Students can distinguish between different types of stimuli and determine if the stimulus is external or internal

Challenge: Students can distungisuh between different types of stimuli, if its external or internal and determine what receptors are being effected and how

​Success Criteria

​Recap

Last Lesson we learnt that a stimulus was a change in environmental conditions that we can observe and respond to.

A response was an action we did due to the stimulus.

We also learnt there were different types of receptors that help us detect temperature, pressure, vibration, chemical and light changes.

The 4 workstations

Station 1: Light station

Station 2: Temperature station

Station 3: Hunger station

Station 4: Dehydration station

Light Station

Step 1: With your partner notice the size of their pupil.
Step 2: While looking up to the light in the room, cover one of your eyes with your hand and close your eye lid.
Step 3: Keep one of your eyes closed and covered with your hand. Keep this covered for 30 seconds.
Step 4: Make sure your partner is ready! Quickly remove your hand and open your eye. Quickly notice how the pupil changes size.
Step 5: Note your observations on the sheet and answer the questions for this station.
If you notice no changes, try again but this time look into the light!

​Temperature Station

Step 1: Using the thermometer measure the temperature of the palm of your hand. Record this result
Step 2: Cover the icecube in a chux towel or paper cloth and place it on the palm of your hand.
Step 3: Hold this icecube in your hand for 30 seconds.
Step 4: Remove the icecube then measure the temperature of the palm of your hand using the thermometer.
Step 5: Record the temperature differences.
Step 6: Wait 30 seconds, then record the temperature of your palm again. Record the results.

​Hunger Station

Step 1: Observe the different pictures showing food.
Step 2: Think about the smells, feelings and taste that these foods create.
Step 3: Note the feelings looking at these pictures bring. Do you notice any internal stimuli?
Example: Saliva production, stomach rubbling

Dehydration Station

Step 1: Using the pulse meter, record your pulse.
Step 2: Drink a cup of water.
Step 3: Wait 30 seconds
Step 4: Record your pulse

Note: Do not talk or move around when you have the pulse meter on, this may ruin your results! Keep your hand steady.

There are 2 types of stimulus

Internal stimulus: Is a stimulus that comes from inside your body
For example: Hunger pains, emotions, a full bladder

External stimulus: Any stimulus from outside the body
For example: Flashing lights, drop in temperature, ball being thrown

Multiple Choice

Station 1: Light station is a...

• Internal Stimulus

• External Stimulus

Multiple Choice

Station 2: Temperature station is a...

• Internal Stimulus

• External Stimulus

Multiple Choice

Station 3: Hunger station is a...

• Internal Stimulus

• External Stimulus

Multiple Choice

Station 4: Dehydration station is a...

• Internal stimulus

• External Stimulus

​Instructions

In groups of 2 You will go around to each station.

Each station has a set of instructions that you will follow.

In station 1: You will see what happens to your pupil when exposed to light.

In station 2: You will see what happens to the temperature of your skin when exposed to a cold stimulus

In station 3: You will see what happens when you are exposed to a hunger stimulus

In station 4: You will see how your pulse changes after drinking water.

Open Ended

Station 1 questions:
1) What was the stimulus?
2) What was the response?
3) Was the stimulus external or internal?

Open Ended

Station 2 questions:
1) What was the stimulus?
2) What was the response?
3) Was the stimulus external or internal?
4) What was the temperature of your skin before the stimulus?
5) What was the temperature after the stimulus?

Open Ended

Station 3 questions:
1) What was the stimulus?
2) What was the response?
3) Was the stimulus external or internal?

Open Ended

Station 4 questions:
1) What was the stimulus?
2) What was the response?
3) Was the stimulus external or internal?
4) What was your pulse before drinking the water?
5) What was your pulse after drinking the water?

Open Ended

Lesson reflection:
a) What did you like about the lesson?
b) Were you able to understand the learning intention?
c) Did you need help through the lesson?
d) Where you able to help someone?

Key points:

There are different types of stimuli and responses

There are 2 types of stimuli, external and internal

Examples of external stimuli can be: Light change, Temperature change, Throwing a ball, A predator etc

Examples of internal stimuli can be: Feeling hungry, Pressure from a full bladder, tiredness etc