Nervous System Basics
The Brain
Stimuli and Responses
Sense Receptors
Path of a Message
100
What is the main job of the nervous system?
What is to send and receive messages throughout the body?
100
What is the main organ of the nervous system?
What is the brain?
100
What is a stimulus?
What is something that causes a reaction in an organism?
100
Which body part contains receptors for light?
What are the eyes?
100
What is the first step in sending a message through the nervous system?
What is a sense receptor detects a stimulus?
200
What organs make up the central nervous system?
What are the brain and spinal cord?
200
Why does your brain remember something better when you do it many times?
What is because repeating an activity strengthens the network of neurons involved in that memory?
200
What is a response?
What is a reaction to a stimulus?
200
What do sensory receptors do?
What is detect stimuli and send signals to the brain?
200
What carries messages to the brain or spinal cord?
What are sensory neurons?
300
What is a neuron?
What is a nerve cell that carries messages?
300
What part of a neuron receives messages from other neurons?
What is the dendrite?
300
What is an example of an external stimulus?
What is touching a hot stove or seeing a bright light?
300
What kind of receptors are found in your skin?
What are mechanoreceptors?
300
What carries messages from the brain to muscles or glands?
What are motor neurons?
400
What helps neurons send messages across the gap between them?
What are neurotransmitters?
400
What part of the neuron sends messages away from the cell body?
What is the axon?
400
What is a reflex?
What is a quick, automatic response to a stimulus?
400
What are olfactory receptors used for?
What is detecting smells in the nose?
400
How do the brain and spinal cord work together in the nervous system?
What is the brain processes the message and the spinal cord helps send it quickly to the body?
500
How do neurons communicate with each other?
What is by sending electrical signals and chemical messages across synapses?
500
Why is the brain considered the control center of the body?
What is because it receives, processes, and sends out information to the body?
500
Why are reflexes important?
What is because they protect the body by reacting quickly without thinking?
500
Why are sense receptors important in the nervous system?
What is because they detect changes in the environment and start the process of sending messages to the brain?
500
In what order does a message travel through the nervous system?
What is receptor → sensory neuron → brain/spinal cord → motor neuron → muscle/gland?