starter: complete the following past exam question: title: responding to change learning objectives...
TRANSCRIPT
Starter: Complete the following past exam
question:
Title: Responding to ChangeLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• The primary goal of the nervous system is to enable you to react to your surroundings and co-ordinate your behaviour.
The Nervous SystemLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• Changes in your surroundings (stimuli) are picked up by cells known as receptors
The Nervous SystemLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• Receptor cells are clustered together in special sense organs, like your eyes or skin.
The Nervous SystemLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
The Nervous SystemLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
How Your Nervous System WorksLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• Once a sensory receptor detects a stimulus, the information is sent in the form of an electrical impulse along cells known as neurons.
How Your Nervous System WorksLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• Neurons are usually arranged in bundles of round a thousand, known as a nerve.
How Your Nervous System WorksLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• The impulse travels along the nerve until it reaches the central nervous system (CNS)
How Your Nervous System WorksLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• Sensory Neurons carry nerve impulses from receptors in the body to the CNS.
• Motor Neurons carry nerve impulses from the CNS to the rest of the body
How Your Nervous System WorksLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
• Impulses that travel along motor neurones cause effector organs like muscles or glands to respond.
• Muscles contract and glands secrete chemical substances.
2. Complete: Receptor ___ CNS ___ Effector3. Explain what happens in your nervous
system when you see a piece of chocolate and eat it.
TaskLearning
ObjectivesWhy do you
need a nervous system?
What is a receptor?
How do you respond to changes in
your surroundings?
Key Words: stimuli, receptors, impulses, sense organs, CNS, neurons, nerves, secretory organs
1. Your ........ system carries fast....... impulses. Changes in the .............. are picked up by your................