Week 4: The Nervous System

What is a stimulus?

• A change in the internal or external environment

• A type of food

• A predator

• A place to live

Which type of neurone carries impulses from receptors to the CNS?

• Sensory neurones

• Relay neurones

• Motor neurones

• Interneurons

Where are relay neurones normally found?

• Brain

• Spinal cord

• Peripheral nerves

• Muscles

What is the function of motor neurones?

• Carry impulses from receptors to the CNS

• Connect sensory neurones to motor neurones

• Carry impulses from CNS to effector

• Transmit impulses within the brain

What do receptors detect?

• Changes in the environment

• Changes in blood pressure

• Changes in muscle tone

• Changes in bone density

Where are receptors found?

• In sense organs

• In muscles

• In bones

• In blood

What type of stimulus do receptors in the ear detect?

• Light

• Sound

• Chemicals

• Touch

Which sense organ has receptors that detect touch, pressure, temperature, and pain?

• Eye

• Ear

• Skin

• Tongue

What do receptors generate impulses in?

• Motor neurones

• Sensory neurones

• Interneurons

• Glial cells

Why is the response from the brain to sensory information very fast?

• Because it is chemical

• Because it is electrical

• Because it is hormonal

• Because it is mechanical