what is the central nervous system built up by ?
The Brain and spinal cord
what is the nervous system built of from
The central nervous system and peripheral nerves (which connect cns to parts of body)
What does the medulla do?
found at the top of the spinal cord it controls unconscious actions - breathing rate, heart rate, peristalsis
What does the cerebrum do ?
At the top of the brain - responsible for conscious thoughts, reasoning, memory and emotion
What is the cerebellum ?
Found at the rear end of the brain - controls balance and coordination movement
What do sensory receptor do ?
found all over the body they detect stimuli from the environment and produce electrical signals
What do sensory neurons do?
They pick up the electrical impulses from the sensory receptors and is carried to CNS
What the stimuli to the rector of your eye
Light
What’s the stimuli to the receptors of your tongue
Chemicals
What’s the 3 neurons
Sensory, inter, moter
What does a sensory neuron do ?
Carry information from the sensory receptors to the CNS
What does inter neurons do ?
Carry information from the sensory to the motor neurons with in CNS
What do motor neurons do ?
Carry informations from the CNS to an effector (gland or muscle)
Explain the reflex arc
Sensory neurons pick up electirical implusles from the receptors and then the inter neurons send that through the CNS to the motor neurons which send it to a effector (muscle or gland)
What’s a good example of a reflex reaction
When a lit match is held near your hand your body uses its reflex reactions to involuntary move your hand away - this protects you from harm
How are reflex reactions really fast ?
They bypass the brain and go straight to the spinal cord so you react faster and the brain realises after the fact
How are reflex reactions really fast ?
They bypass the brain and go straight to the spinal cord so you react faster and the brain realises after the fact
What is the synapse
Is the gap between each neuron that the electrical impulse has to cross between to pass on its messGe
How is information carried across the synapse
Chemicals called neurotransmitters
What’s the difference between hormones and neurons
Hormones are chemical messengers where are neurons are electrical
